'Faint hearted' in the Bible

And say unto him, Take heed, and be quiet; fear not, neither be fainthearted for the two tails of these smoking firebrands, for the fierce anger of Rezin with Syria, and of the son of Remaliah.

The fishers shall mourn, all such as cast angles in the water shall complain, and they that spread their nets in the water shall be faint hearted.

Say to the cowardly:“Be strong; do not fear!Here is your God; vengeance is coming.God’s retribution is coming; He will save you.”