Yahya related to me from Malik that he had heard that when theMessenger of Allah, may Allah bless him and grant him peace, hadfinished his tawaf of the House, prayed two rakas, and wanted to go toSafa and Marwa, he would salute the corner of the Black Stone beforehe left.
USC-MSA web (English) reference: Book 20, Hadith 113
Arabic reference: Book 20, Hadith 816