'Testimony' in the Bible

Yahweh's law is perfect, restoring the soul. Yahweh's testimony is sure, making wise the simple.

For he established a testimony in Jacob, and appointed a teaching in Israel, which he commanded our fathers, that they should make them known to their children;

He appointed it in Joseph for a testimony, when he went out over the land of Egypt, I heard a language that I didn't know.

If your children will keep my covenant, my testimony that I will teach them, their children also will sit on your throne forevermore."