John Gill Bible Commentary

In the day of my trouble I will call upon thee,.... David had his troubles, both inward and outward, before and after he came to the throne, in private and public life; and every good man has his troubles; and there are some particular times or days of trouble; which trouble arises from different causes; sometimes from themselves, their corruptions, the weakness of their grace, and the poor performance of their duties; sometimes from others; from the persecutions of the men of the world; from the wicked lives of profane sinners, and especially professors of religion, and from the spread of false doctrine; sometimes from Satan and his temptations; and sometimes from the more immediate hand of God in afflictions, and from the hidings of his face: these troubles do not last always; they are but for a day, for a particular time; and such a season is a fit one for prayer, and the Lord invites and encourages his people to call upon him in prayer when this is the case, Psa 50:15. Christ had his times of trouble, in which he called upon his divine Father, Joh 11:33. for thou wilt answer me; which the idols of the Gentiles could not do; Baal could not answer his priests, Kg1 18:26, this the psalmist concluded, both from the promise of God, Psa 50:15, and from his frequent experience, Psa 138:3, a very encouraging reason or argument this to call on the Lord: Christ was always heard and answered, Joh 11:41.