And when he was twelve years old, they going up into Jerusalem, according to the custom of the feast,

and when he became twelve years old, they having gone up to Jerusalem, according to the custom of the feast,

And when He was twelve years old they went up as was customary at the time of the Feast, and,

And when he had become twelve years old, they ascended to Jerusalem, according to the custom of the feast day.

When Jesus was twelve years old, they went according to custom to Jerusalem,

Twelve years old - All males among the Hebrews were required to appear three times a year before God, to attend on the ordinances of religion in the temple, and it is probable that this was the age at which they first went up to Jerusalem, Exodus 23:14-17; Deuteronomy 16:16.
To Jerusalem - Where the feasts of the Jews were all held. This was a journey from Nazareth of about 70 miles.
After the custom of the feast - According to the usual manner of the feast.

And when he was twelve years old,.... Not that he was now, , "a son of the commandment", (r) to use the Jewish phrase; or now came under the yoke of the law; or was obliged to the duties of adult church membership, as is asserted by some; nor particularly to go to Jerusalem to make his appearance at the feast of the passover, or any other feast: for according to the maxims of the Jews, persons were not obliged to the duties of the law, or subject to the penalties of it in case of non-performance, until they were, a female, at the age of twelve years, and one day, and a male, at the age of thirteen years, and one day; but then they used to train up their children, and inure them to religious exercises before: as for instance, though they were not obliged to fast on the day of atonement, until they were at the age before mentioned; yet, they used them to it two or three year's before, as they were able to endure it: a son of nine, or ten years old, they train him up by hours; they make him fast so many hours; and one of eleven, or "twelve years old", they make him fast a whole day: but then this was not law, but custom; and which they observed, that they might be used to the commandments (s), and be expert in them, and ready to perform them when required. It is said, (t) that "there was a good custom in Jerusalem to make their little sons and daughters fast on a fast day; the son of a year, till the very day he is "twelve years old", when he fasts the whole day; and after that they carry him, and bring him before every ancient man, that he may bless him, and confirm him, and pray over him, that he may be worthy in the law, and in good works; and: every one that is greater than he in the city, he stands up from his place, and goes before him, and bows to him, to pray for him: and this is to learn him, that they are beautiful, and their works beautiful and acceptable to God; and they did not use to leave their little children behind them, but brought them to the synagogues, , "that they might be ready in the commandments".
That they might be inured to them, and expert in them, when they were under obligation to them; for they were not properly under the law, until they were arrived to the age above mentioned; nor were they reckoned adult church members till then, nor then neither, unless worthy persons: for so it is said (u),
"he that is worthy, at thirteen years of age, is called , "a son of the congregation of Israel";
that is, a member of the church. When therefore Joseph and Mary took Jesus along with them, at this age,
when they went up to Jerusalem, after the custom of the feast of the passover, it shows their religious regard to him; and may be an instruction to parents, to bring up their children in the nurture and admonition of the Lord, after their example,
(r) Aben Ezra in Genesis. xvii. 14. (s) Misn. Yoma, c. 8. sect. 4. & Maimon. & Bartenora in ib. T. Bab. Yoma, fol. 82. 1. Maimon. Hilch. Shebitat Asur, c. 2. sect. 10, 11. (t) Massechet Sopherim, c. 18. sect. 5. (u) Zohar in Exod. fol. 39. 4.

FIRST CONSCIOUS VISIT TO JERUSALEM. (Luke 2:41-52)
went up--"were wont to go." Though males only were required to go up to Jerusalem at the three annual festivals (Exodus 23:14-17), devout women, when family duties permitted, went also, as did Hannah (1-Samuel 1:7), and, as we here see, the mother of Jesus.
when twelve years old--At this age every Jewish boy was styled "a son of the law," being put under a course of instruction and trained to fasting and attendance on public worship, besides being set to learn a trade. At this age accordingly our Lord is taken up for the first time to Jerusalem, at the passover season, the chief of the three annual festivals. But oh, with what thoughts and feelings must this Youth have gone up! Long ere He beheld it, He had doubtless "loved the habitation of God's house and the place where His honor dwelt" (Psalm 26:8), a love nourished, we may be sure, by that "word hid in His heart," with which in afterlife He showed so perfect a familiarity. As the time for His first visit approached, could one's ear have caught the breathings of His young soul, he might have heard Him whispering, "As the hart panteth after the water brooks, so panteth my soul after Thee, O God. The Lord loveth the gates of Zion more than all the dwellings of Jacob. I was glad when they said unto me, Let us go unto the house of the Lord. Our feet shall stand within thy gates, O Jerusalem!" (Psalm 42:1; Psalm 87:2; Psalm 122:1-2). On catching the first view of "the city of their solemnities," and high above all in it, "the place of God's rest," we hear Him saying to Himself, "Beautiful for situation, the joy of the whole earth is Mount Zion, on the sides of the north, the city of the great King: Out of Zion, the perfection of beauty, God doth shine" (Psalm 48:2; Psalm 50:2). Of His feelings or actions during all the eight days of the feast not a word is said. As a devout child, in company with its parents, He would go through the services, keeping His thoughts to Himself. But methinks I hear Him, after the sublime services of that feast, saying to Himself, "He brought me to the banqueting house, and his banner over me was love. I sat down under his shadow with great delight, and his fruit was sweet to my taste" (Song 2:3-4).

When he was twelve years old. At the age of twelve a boy was called by the Jews "son of the law," and first incurred legal obligation. Henceforth it would be his personal duty to keep the law.