What does Genesis 24:42 mean?

I asked my master, ‘What if the woman will not follow me?’

He said to me, ‘Yahweh, before whom I walk, will send his angel with you, and prosper your way. You shall take a wife for my son from my relatives, and of my father’s house.

Then will you be clear from my oath, when you come to my relatives. If they don’t give her to you, you shall be clear from my oath.’

behold, I am standing by this spring of water. Let it happen, that the maiden who comes out to draw, to whom I will say, “Please give me a little water from your pitcher to drink,”

and she will tell me, “Drink, and I will also draw for your camels,”—let her be the woman whom Yahweh has appointed for my master’s son.’

Before I had finished speaking in my heart, behold, Rebekah came out with her pitcher on her shoulder. She went down to the spring, and drew. I said to her, ‘Please let me drink.’