Genesis 24:13-14

13See, I am standing here near this well. The daughters of the people who live in the town will come to get water from the well.

14I will say to one of the young women, “Please let me have a drink of water from your pot.” If she is the right woman for your servant Isaac to marry, please may she say, “Yes, drink. Then I will give water to your camels also”. If that happens, then I will know that you have kept your promise to my master.’