It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), he says: I saw that the Messenger of Allah (peace and blessings be upon him) used to perform istilam (touching or kissing) of only the two Yemeni corners of the Ka'bah (i.e., Rukn Yamani and Hajar Aswad).
Hadith Referenceالفتح الربانی / كتاب الحج والعمرة / 4347
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«أخرجه البخاري: 1609، ومسلم: 1267، (انظر مسند أحمد ترقيم الرسالة: 6017 ترقیم بيت الأفكار الدولية: 6017»
Brief Explanation
Benefits: … The Yemeni Corner (Rukn Yamani) and the Black Stone (Hajar Aswad) are, by predominance, both referred to as the "two Yemeni corners," just as "father" (ab) and "mother" (umm) are called "abawan" (the two parents), and the sun (shams) and the moon (qamar) are called "qamaran" (the two luminaries).