Genesis 24:45
And before I had done speaking in mine heart, behold, Rebekah came forth with her pitcher on her shoulder; and she went down unto the well, and drew water: and I said unto her, Let me drink, I pray thee.
Cross-reference
The servant retells the event of vv.15-20 — Rebekah arriving before he finished praying, drawing water, and offering it generously.
In Genesis 24:19, Rebekah offers water to the servant, which is the specific sign he asked for. This is the direct, immediate fulfillment of his prayer.
In Isaiah 65:24, God promises 'before they call, I will answer' — the servant's prayer was answered before he even finished speaking.
In Daniel 9:23, Gabriel arrives at the beginning of Daniel's prayer, mirroring how Rebekah appeared as the servant was praying—both show God's response arriving during the petition.
In Acts 10:30, Cornelius sees an angel after praying at the hour he always prayed. This parallels the servant's specific prayer being answered by an appearance.