Muhammad bin Abbad bin Ja'far narrated that I saw Ibn Abbas (may Allah be pleased with them) come to the Black Stone, and his head was dusty. He kissed it, then prostrated on it, then kissed it and prostrated on it, then kissed it and prostrated on it.
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 951