As with a sword in my bones, mine enemies reproach me; while they say daily unto me, Where is thy God?
(As) with a sword in my bones, mine enemies reproach me - literally, 'in slaughter;' i:e., it is like a slaughter ("a sword," the instrument of slaughter, Ezekiel 21:28) "in my bones," that "mine enemies reproach me." Reproaches are to David's soul what the sword or slaughter is to the body (Luke 2:35). The "bones" express the inmost part.
While they say daily unto me, Where is thy God? For, Psalms 42:3, "continually," there, is here substituted "daily." Their "reproach" was that his present situation refuted his pretension to a filial relation to God as his God. What gave this reproach its sting was, it found an echo in the breast of the sufferer. His suffering seemed to be the expression of God's displeasure at his sins. He therefore prays God to take away this reproach by delivering him from his present situation.