Lift up thy feet, i.e. come speedily for our rescue, and do not sit or stand still, as hitherto thou seemest to do. Unto the perpetual desolations; or rather, because of (as this prefix oft signifies) the perpetual desolations. So it is a powerful motive to God, to come to their help, because otherwise our destruction is everlasting and irrecoverable. In the sanctuary; or, against thy sanctuary; of which see Psalms 74:7.
Related Commentaries of Psalms 74:3
Psalms 74:3
3 Lift up thy feet unto the perpetual desolations; even all that the enemy hath done wickedly in the sanctuary.