'Fail' in the Bible

And the man of thine whom I shall not cut off from mine altar, shall be to cause thine eyes to fail and to grieve thy soul; and all the increase of thy house shall die in their vigour.

And David said to Saul, Let no man's heart fail because of him: thy servant will go and fight with this Philistine.

And David said to Jonathan, Behold, to-morrow is new moon, and I should not fail to sit with the king at meat; but let me go, that I may hide myself in the field until the third evening.