Deuteronomy 9:25

And I prayed before the Lord forty days and forty nights, the number that I prayed [before], for the Lord said that he would utterly destroy you.

Thus I fell down before the Lord forty days and forty nights, as I fell down at the first; because the Lord had said he would destroy you.

So I fell down before Yahweh the forty days and forty nights that I fell down, because Yahweh had said he would destroy you.