For I bear him record - Paul had had abundant opportunity to know what were his feelings in regard to these churches.
A great zeal for you - A great desire to promote your welfare.
And them that are in Laodicea - Laodicea was the capital of Phrygia, and not far from Colossae, There was a church there. See the Introduction, and the notes at Colossians 4:16.
And them in Hierapolis - This was also a city in Phrygia, and not far from Laodicea and Colossae. It was situated under a hill to the north, and had on the south a large plain about five miles over. On the south of that plain, and opposite to Hierapolis, was Laodicea, with the river Lycus running between them, nearer to Laodicea than to Hierapolls. This place is now called by the Turks Pambuck-Kulasi, or the Cotton-Tower, on account of the white cliffs which lie round about it. It is now utterly forsaken and desolate, but the ruins are so magnificent as to show that it was once one of the most splendid cities in the East. It was celebrated for the hot springs in its vicinity; and on account of the numerous temples erected there, it received the name of Hierapolis, or the holy city. The principal deity worshipped there was Apollo. See Travels by T. Smith. B. D. 1678. Compare the notes at Colossians 4:16. From the allusion to it here, it would seem that there were Christians there in the time of Paul, though there is no mention of a church there. It is nowhere else mentioned in the New Testament.

He hath a great zeal for you - Instead of ζηλον πολυν, much zeal, ABCD**, several others, with versions and fathers, read πολυν πονον, much labor; they are here nearly of the same meaning, though the latter appears to be the better and genuine reading.
Laodicea, and - Hierapolis - These were both cities of Phrygia, between which Colosse, or the city of Colassa, was situated. See Colossians 2:1. The latter was called Hierapolis, or the holy city, from the multitude of its temples. Apollo, Diana, Esculapius, and Hygeia, were all worshipped here, as appears by the coins of this city still extant.

For I bear him record,.... The apostle was an eye and ear witness of his fervent prayers, his labour of love, and zealous affection for these saints and others; and therefore, as he judged he ought, he bears a testimony for him,
that he hath a great zeal for you; for their spiritual welfare, that the Gospel might continue with them, and they in that, against false teachers, and their attempts to subvert them; that they might grow in the grace of the Gospel, and walk worthy of it, and be at peace among themselves:
and them that are in Laodicea, and them in Hierapolis; cities in Phrygia, which lay near to Colosse, the one being situated by the river Lycus, and the other by the Maeander; here were many believers, for whom Epaphras had a like zeal and affections as for the Colossians, and to whom very likely he had been useful, either in conversion or edification, or both. The apostle takes no notice to the Colossians of Epaphras being his fellow prisoner, as, he does in his epistle to Plm 1:23 it may be for this reason, lest they should be over much distressed and cast down with it.

a great zeal--The oldest manuscripts and Vulgate have "much labor."
for you--lest you should be seduced (Colossians 2:4); a motive why you should be anxious for yourselves.
them that are in Laodicea . . . Hierapolis--churches probably founded by Epaphras, as the Church in Colosse was. Laodicea, called from Laodice, queen of Antiochus II, on the river Lycus, was, according to the subscription to First Timothy, "the chiefest city of Phrygia Pacatiana" (1-Timothy 6:21). All the three cities were destroyed by an earthquake in A.D. 62 [TACITUS, Annals, 14.27]. Hierapolis was six Roman miles north of Laodicea.