'In Time of Trouble' in the Bible

Putting one's faith in a false man in time of trouble is like a broken tooth and a shaking foot.

O Lord, have mercy on us; for we have been waiting for your help: be our strength every morning, our salvation in time of trouble.

O you hope of Israel, its saviour in time of trouble, why are you like one who is strange in the land, and like a traveller putting up his tent for a night?