'Fail' in the Bible

for Yahweh your God is a merciful God; he will not fail you, neither destroy you, nor forget the covenant of your fathers which he swore to them.

Your sons and your daughters shall be given to another people; and your eyes shall look, and fail with longing for them all the day: and there shall be nothing in the power of your hand.

Be strong and courageous, don't be afraid, nor be scared of them: for Yahweh your God, he it is who does go with you; he will not fail you, nor forsake you."

Yahweh, he it is who does go before you; he will be with you, he will not fail you, neither forsake you: don't be afraid, neither be dismayed."