It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she said: "O Messenger of Allah (peace and blessings be upon him), all your wives have a kunyah (an honorific name), except me." He (peace and blessings be upon him) said: "Take your kunyah after your (nephew and spiritual) son, Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with him)." After that, her (may Allah be pleased with her) kunyah became known as "Umm Abdullah".
Hadith Referenceمسند أبي يعلى الموصلي / مسند عائشة / 4500
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث مسند ابی یعلی محققاً تنسیق حسين سليم أسد - مکتبہ شاملہ :قال حسين سليم أسد: إسناده صحيح . » «قال سعيد بن محمد السناري: صحيح» «أخرجه سنن أبي داود برقم: 4970، مسند ابویعلیٰ ترقیم الاثری: 4483»