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 Psa_74:7.