Yahweh is describing a hypothetical situation. Here "ten thousand times" is an exaggeration that means no matter how many times he gave the people the law, they would still refuse to obey him. Alternate translation: "Even if I wrote down my law for them very many times, they would" (See: [[rc://en/ta/man/translate/figs-hypo]] and [[rc://en/ta/man/translate/figs-hyperbole]])