Amasa in Fausset's Bible Dictionary
1. Son (seemingly illegitimate) of Jether or Ithra, an
Ishmaelite, by Abigail, David's sister (2 Samuel 17:25; 1
Chronicles 2:15-17). (See ABSALOM.) Joined his rebellion,
probably because neglected by David (as appears from his not
being mentioned previously) on account of his Ishmaelite
parentage (Zeruiah occurs always without mention of her
husband; but Abigail always with her husband Jether, as
though in disparagement). Defeated in the wood of Ephraim by
Joab (2 Samuel 18).
David, to atone for past neglect, pardoned, and even
promoted him to command the army in the room of the
overbearing Joab. Amasa's slowness in crushing Sheba's
rebellion, perhaps owing to the disinclination of the troops
to be under his command, obliged David to dispatch Abishai
with the household guards, and Joab accompanied them. Amasa
and his force overtook them at "the great stone of Gibeon."
There Joab, while taking with his right hand Amasa's beard
to kiss him, with his left stabbed him with his sword (2
2. AMASAI, leader of a body of men of Judah and
Benjamin, to join David in the hold at Ziklag; David's
apprehension of treachery on the part of his own tribe was
dispelled by Amasa's words under the spirit which "clothed"
him: "Thine are we, David, and on thy side, thou son of
Jesse; peace, peace be unto thee, and peace be to thine
helpers, for thy God helpeth thee." (Margin 1 Chronicles
12:16-18.) 1 Chronicles 12:3. A prince of Ephraim, son of
Hadlai, who, at the prophet Oded's command from God, opposed
the detention of the Jews taken captive by Pekah of Israel
from Ahaz of Judah (2 Chronicles 28:12).