The spirit came upon Amasai - "The spirit of fortitude clothed Amasai, the chief of the mighty men; and he answered, For thy sake, O David, are we come, that we may be with thee, thou son of Jesse.
Prosperity be to thee by night and by day; and prosperity be to thy helpers; for the Word of the Lord is thy assistant." - T.
Amasai - The marginal reference identifies him with Amasa, David‘s nephew, but it seems unlikely that David would have misdoubted a band led by his own nephew.
The passionate earnestness of Amasai‘s speech is strongly marked in the original, and will be better seen by omitting the words which our Version adds in italics. Here, as in 1 Chronicles 12:8-15, we have manifestly the actual words of a very ancient record.