These are the ones who crossed the Jordan in the first month when it was overflowing all its banks, and they put to flight all those in the valleys, both to the east and to the west.
We have here an account of those that appeared and acted as David's friends, upon the death of Saul, to bring about the revolution. All the forces he had, while he was persecuted, was but 600 men, who served for his guards; but, when the time had come that he must begin to act offensively, Providence brought in more to his assistance.
Commenting on 1 Chronicles 12:1-22
Then the spirit came upon Amasai,.... Or "clothed" (f) him; a spirit of fortitude, as the Targum, of strength, courage, and presence of mind, with which he was endowed, covered, and clothed as with a garment; this was a sister's son of David's, see Sa2 17:25.
These are they that went over Jordan in the first month--that is, in spring, when the swollen river generally fills up the banks of its channel (see on Jos 3:14; Jos 4:19; Jos 5:10). they put to flight all them of the valleys--This was probably done at the time of their separating themselves and their purpose being discovered, they had to cut their passage through...