Lady Aisha (may Allah be pleased with her) narrates that after the command of veiling was revealed, my (foster) uncle came and began seeking permission to enter upon me. I did not grant him permission. When the Prophet (peace and blessings be upon him) arrived, I asked him about it. He (peace be upon him) said: Grant him permission, he is your uncle. I said: The woman nursed me, not the man. He (peace be upon him) said: May your hand be dusty! Grant him permission, he is your uncle.
Hadith Referenceالمنتقى ابن الجارود / كتاب النكاح / 692