It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that Sayyidah Zaynab bint Rasulullah (peace and blessings be upon him) granted protection to Abu al-As, and the Prophet (peace and blessings be upon him) upheld her protection; and Sayyidah Umm Hani' bint Abi Talib (may Allah be pleased with her) granted protection to her brother Aqil, and the Prophet (peace and blessings be upon him) upheld her protection too.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19251