'Faint hearted' in the Bible

and say unto him, 'Take heed to thyself and be still, but fear not, neither be fainthearted for these two tails: that is, for these two smoking firebrands, the wrath and furiousness of Rezin the Syrian and Remaliah's son.

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.