That a man asked Ibn Umar about touching the (Black) Stone, so he said: "I saw the Prophet touching it and kissing it." So the man said: "What is your view if there is a throng (around the Ka'bah) and what is your view if the people overpowered me?" Ibn Umar said: "Leave 'What is your view' in Yemen. I saw the Prophet touching it and kissing it."
Jami` at-Tirmidhi Book 9, Hadith 54
← Previous Hadith "I saw Umar bin Al-Khattab kissing the (Black) Stone and saying: 'I am kissing you while I know that you are just a stone, and if I had not seen the Messenger of Allah kissing you, I would not kiss you.'"

Jami` at-Tirmidhi Book 9, Hadith 53 Next Hadith → "When the Prophet arrived in Makkah, he performed seven (circuits) of Tawaf around the House. Then he came to the Maqam and said: And take you (people) the Maqam (place) of Ibrahim as a place of prayer. Then he prayed behind the Maqam. Then he came to the (Black) Stone to touch it. Then he said: 'We begin with what Allah began with.' So he began at As-Safa and recited: Indeed As-Safa and Al-Marwah are among the Symbols of Allah."

Jami` at-Tirmidhi Book 9, Hadith 55