Exodus

And he made his camels to kneel down without the city by a well of water at the time of the evening, even the time that women go out to draw water.

Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.

And as they went up the hill to the city, they found young maidens going out to draw water, and said unto them, Is the seer here?

And let it come to pass, that the damsel to whom I shall say, Let down thy pitcher, I pray thee, that I may drink; and she shall say, Drink, and I will give thy camels drink also: let the same be she that thou hast appointed for thy servant Isaac; and thereby shall I know that thou hast shewed kindness unto my master.

And she hasted, and emptied her pitcher into the trough, and ran again unto the well to draw water, and drew for all his camels.