Psalms 74:11 - Coke's Commentary on the Holy Bible

Why withdrawest thou thy hand— Their upper garments having no sleeves, the arms were wrapped up and covered under them; and consequently, when the hand was made use of, it must have been disengaged from the garment, and made bare. The phrase, why withdrawest thou thy hand? must therefore imply inactivity, and that God suspended the exercise of his power, and was an inactive spectator of the miseries of his people. In the next verses the Psalmist proceeds to encourage himself in the hopes of deliverance from God, by a review of the mighty works which he had heretofore wrought for his people. See Taylor's Hebrew Concordance.