Mahanaim - The two hosts, if read by the points, the angels forming one, and Jacob and his company forming another; or simply hosts or camps in the plural. There was a city built afterwards here, and inhabited by the priests of God, Joshua 21:38. For what purpose the angels of God met Jacob, does not appear from the text; probably it was intended to show him that he and his company were under the care of an especial providence, and consequently to confirm his trust and confidence in God.
The doctrine of the ministration of angels has been much abused, not only among the heathens, but also among Jews and Christians, and perhaps most among the latter. Angels with feigned names, titles, and influences, have been and still are invoked and worshipped by a certain class of men; because they have found that God has been pleased to employ them to minister to mankind; and hence they have made supplications to them to extend their protection, to shield, defend, instruct, etc. This is perfectly absurd.
1. They are God's instruments, not self-determining agents.
2. They can only do what they are appointed to perform, for there is no evidence that they have any discretionary power.
3. God helps man by ten thousand means and instruments; some intellectual, as angels; some rational, as men; some irrational, as brutes; and some merely material, as the sun, wind, rain, food, raiment, and the various productions of the earth. He therefore helps by whom he will help, and to him alone belongs all the glory; for should he be determined to destroy, all these instruments collectively could not save. Instead therefore of worshipping them, we should take their own advice: See thou do it not - Worship God.

And when Jacob saw them, he said, (a) This [is] God's host: and he called the name of that place Mahanaim.
(a) He acknowledges God's benefits: who for the preservation of his, sends hosts of angels.

And when Jacob saw them,.... These appeared in a visible form, most probably human, and in the habit, and with the accoutrements of soldiers, and therefore afterwards called an host or army. Aben Ezra thinks that Jacob alone saw them, as Elisha first saw the host of angels before the young man did that was with him, 2-Kings 6:17,
he said, this is God's host: or army, hence he is often called the Lord of hosts; angels have this name from their number, order, strength, and military exploits they perform:
and he called the name of the place Mahanaim; which signifies two hosts or armies; either his own family and company making one, and the angels another, as Aben Ezra observes; or they were the angels, who very probably appeared in two companies, or as two armies, and one went on one side of Jacob and his family, and the other on the other side; or the one went before him, and the other behind him; the latter to secure him from any insult of Laban, should he pursue after him, and distress him in the rear, and the former to protect him from Esau, near whose country Jacob now was, and of whom he was in some fear and danger; thus seasonably did God appear for him. The Jewish writers (t) say, the host of God is 60,000, and that the Shechinah, or divine Majesty, never dwells among less, and that Mahanaim, or two hosts, are 120,000; there was afterwards a city of this name near this place, which very likely was so called in memory of this appearance, Joshua 21:38; and there seems to be an allusion to it in the account of the church, Song 6:13; it was in the land of Gilead, and tribe of Gad, forty four miles from Jerusalem to the southeast (u).
(t) In Bereshit Rabba, sect. 75. fol. 66. 1. (u) Bunting's Travels, p. 74.

Mahanaim--"two hosts," or "camps." The place was situated between mount Gilead and the Jabbok, near the banks of that brook.

This is God's house - A good man may, with an eye of faith, see the same that Jacob saw with his bodily eyes. What need we dispute whether he has a guardian angel, when we are sure he has a guard of angels about him? To preserve the remembrance of this favour, Jacob gave a name to the place from it, Mahanaim, two hosts, or two camps probably they appeared to him in two hosts, one on either side, or one in the front, and the other in the rear, to protect him from Laban behind, and Esau before, that they might be a compleat guard. Here was Jacob's family that made one army, representing the church militant and itinerant on earth; and the angels another army, representing the church triumphant, and at rest in heaven.