Hadith No: 1
Ibn Hajar al-Asqalani - Al-Isabah fi Tamyiz al-Sahabah - Letter 'A'
Volume One - Chapter on the letter 'A' followed by 'N' - 288: Anah the Eunuch
Volume: (1) - Page Number: (284)
[The text is lengthy, so only the relevant excerpt is provided here]
288 - Al-Bawardi mentioned him and narrated from the way of Ibrahim ibn Mahajir from Abu Bakr ibn Hafs, who said: Aisha said to a eunuch who was in Medina, known as (Anah): "Will you not indicate to us a woman we can propose to for Abdul Rahman ibn Abi Bakr?" He replied, "Yes," and described a woman who, when she came toward you, came with four (companions), and when she turned away, turned with eight. Rasulullah (peace be upon him and his holy progeny) heard him and said, "O (Anah), go out from Medina to Humra' al-Asad, and make your home there. Do not enter Medina again unless the people have a festival."

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Reference: Al-Isaabah Fi Tamyeez al-Sahaabah Book 1

Hadith No: 2
Al-Ayni - Umdat al-Qari Sharh Sahih al-Bukhari - Book of the Virtues of the Qur'an
Chapter on prohibitions against those who resemble women entering upon a woman
Volume: (20) - Page Number: (215)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... Al-Mawardi mentioned in (The Companions) via the narration of Ibrahim ibn Muhajir from Abu Bakr ibn Hafs that Aisha said to a eunuch who was in Medina and was called (Antha), with the hamzah pronounced and the nun doubled: "Will you not guide us to a woman whom you can propose to marry to Abd al-Rahman ibn Abi Bakr?" He replied, "Yes," and described a woman who approached with four (legs) and turned away with eight. The Prophet (peace be upon him and his holy progeny) heard him and said, 'O Antha, go out of Medina to Humrat al-Asad, and make your home there.'

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Reference: Umdat alqari Sharh Saheeh albukhari Book 20