Midrasch zu Bereschit 24:56

The servant arose early in the morning and saw the angel standing and waiting for him in the street. He said to them: "Do not hinder me, for the Lord hath prospered my way" (Gen. 24:56). For behold, the man who came with me yesterday, he has prospered my way; behold, he is standing || and waiting for me in the street, as it is said, "And he said to them, Do not hinder me, for the Lord hath prospered my way." They ate and drank at Rebecca's (bridal) banquet. Like a precentor, who is standing and blessing the bride in her bridal canopy, so they stood and blessed Rebecca their sister (wedded) to Isaac, as it is said, "And they blessed Rebecca, and said unto her, Our sister…" (Gen. 24:60).

Rabbi 'Aḳiba said: Anyone who enters a city, and finds maidens coming forth before him, his way will be prosperous (before him). Whence dost thou know this? Know that it is so. Come and see from Eliezer, the servant of our father Abraham, who, whilst he had not yet entered the city, found maidens coming out before him, as it is said, "Behold, I stand by the fountain of water," etc. (Gen. 24:43). And He prospered his way.