Any rock ... - The term rock as applied to God is first found in the song of Moses (see Deuteronomy 32:4 note), where the juxtaposition of rock and salvation in 1 Samuel 2:15, “he lightly esteemed the rock of his salvation,” seems to indicate that Hannah was acquainted with the song of Moses.
Related Commentaries of 1 Samuel 2:2
1 Samuel 2:2
2 There is none holy as the LORD: for there is none beside thee: neither is there any rock like our God.