Nafi' (may Allah have mercy on him) narrated: I saw Sayyiduna Ibn Umar (may Allah be pleased with them both) touch the Black Stone with his hand and kiss his hand, and he said: "I have not abandoned it since I saw the Prophet (peace and blessings be upon him) doing it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9226
Ata said: I saw Jabir bin Abdullah (may Allah be pleased with him), Abu Hurayrah (may Allah be pleased with him), Abu Sa'id al-Khudri (may Allah be pleased with him) and Ibn Umar (may Allah be pleased with him): when they touched the Black Stone, they would kiss their hands.
Ibn Jurayj said: I said to Ata: "And Ibn Abbas?" He said: "And Ibn Abbas too, many times, I think."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9227