Tosefta for Psalms 104:26

שָׁ֭ם אֳנִיּ֣וֹת יְהַלֵּכ֑וּן לִ֝וְיָתָ֗ן זֶֽה־יָצַ֥רְתָּ לְשַֽׂחֶק־בּֽוֹ׃

There go the ships; There is leviathan, whom Thou hast formed to sport therein.