Lots and lots of alliteration and assonance in this gorgeous poem! The reference to psalms brings us the verse of "I will sleep in peace," I have read this verse so many times when I couldn't sleep. "In night's hip pocket" ... clever, clever,clever! My only suggestion: I'm not sure I like "an old ally." I wanted to read "old ally" or "the old ally".
I know you wanted the short a sound there, but it doesn't quite work for me. Again, another brilliant poem.