'Faint hearted' in the Bible

And vain men, sons of Belial, gathered to him and strengthened themselves against Rehoboam the son of Solomon, and Rehoboam was young and faint-hearted, and did not shew himself strong against them.

And he said, "Hearken all Judah and the inhabiters of Jerusalem, and also king Jehoshaphat! Thus sayeth the LORD unto you: 'Be not afeard or faint hearted by reason of this great multitude. For the war is not yours, but God's.