Numbers 21:15-17

¹⁵And he has appointed brooks to cause Er to dwell there; and it lies near to the coasts of Moab.

¹⁶And thence they came to the well; this is the well of which the Lord said to Moses, Gather the people, and I will give them water to drink.

¹⁷Then Israel sang this song at the well, Begin to sing of the well;