When God arose to judgment. The great object which God had in view in executing this judgment is now declared; which was, that he might furnish a proof of his fatherly love towards all his people. He is, therefore, introduced as speaking, not with his mouth, but with his hand, that he may show to all how precious in his sight is the salvation of all who fear and love him. Under the word arise, there is a reference to the inactivity and indolency ascribed by wicked men to God, an opinion which had led them to take so much liberty to themselves. God is then said to ascend into his judgment-seat, when he plainly indicates that he exercises a special care over his Church. The design of the passage is to show that it is as impossible for God to forsake the afflicted and innocent, as it is impossible for him to deny himself. It is to be observed that he is termed Judge, because he affords succor to the poor who are unrighteously oppressed. The appellation of the meek or humble of the earth is applied to the faithful, who, subdued by afflictions, seek not high things, but, with humble groaning, patiently bear the burden of the cross. The best fruit of afflictions is, when thereby we are brought to purge our minds from all arrogance, and to bend them to meekness and modesty. When such is the effect, we may conclude with certainty that we are under the guardianship and protection of God, and that he is ready to extend his aid and favor towards us.

When God arose to judgment - That is, when he came to overthrow and destroy the enemies of his people, as referred to in the former part of the psalm.
To save all the meek of the earth - Of the land - to wit, the land of Judea; or, to save his people when in affliction. The word "meek," which with us usually means those who are forbearing under injuries, means here the humble, the afflicted, the crushed, the oppressed.

The meek of the earth - The humbled or oppressed people of the land. The poor Jews, now utterly helpless, and calling upon the Lord for succor.

When God arose to judgment, to (f) save all the meek of the earth. Selah.
(f) To avenge the wrongs done to your Church.

When God arose to judgment,.... He may sometimes seem to be asleep, and to defer judgment, but he will arise and hasten it in his own time, and will take vengeance on all his and his people's enemies, as he did upon the army of the Assyrians, and will upon the antichristian powers, and upon all the wicked, and at the same time will save his own people, as follows:
to save all the meek of the earth; the quiet in the land, who are afflicted in this world, despised by the men of it, are lowly and humble, and mean in their own eyes; these the Lord takes notice of and cares for them, he will beautify them with salvation; these, all of them, even everyone of them, shall be saved in him with an everlasting salvation; this verse is by some connected with the preceding; so Kimchi, "the earth feared, and was still, when God arose to judgment", &c. and by others, as R. Moses and Aben Ezra, with the following.
Selah. See Gill on Psalm 3:2.