"There is no one holy like the LORD, indeed, there is no one besides You,
nor is there any rock like our God." 1 Samuel 2:2
This was part of the prayer that Hannah prayed after the birth of her son Samuel.
"Rock" is a metaphor for God that emphasizes His strength and the security of those who trust in Him (see Deu. 32:4; ps. 18:1,2).