My tears have been my meat day and night— i.e. "I am wholly given over to grief and sorrow, whilst I hear the continual reproaches of mine enemies, saying unto me, What is become of thy God, in whom thou wast wont to repose so much confidence?" See Archbishop Sharp's Sermons, vol. 3: p. 2, &c.
Related Commentaries of Psalms 42:3
Psalms 42:3
3 My tears have been my meat day and night, while they continually say unto me, Where is thy God?