Jami` at-Tirmidhi Book 47, Hadith 362
“We were with the Messenger of Allah when Surat Al-Jumuah was revealed, so he recited it until he reached: And other among them who have not yet joined them, A man said to him: ‘O Messenger of Allah! Who are these people who have not yet joined us?’ But he did not say anything to him.” He said: “Salman was among us.” He said: “So the Messenger of Allah placed his hand upon Salman and said: ‘By the One in whose Hand is my soul! If faith were on Pleiades then men among these people would reach it.”’
“A group of us Companions of the Messenger of Allah sat talking, and we said: ‘If we knew which deed was most beloved to Alllah then we would do it.’ So Allah, Most High, revealed: Whatsoever is in the heavens and whatsoever is on the earth glorifies Allah. And He is Almighty, the All-Wise. O you who believe! Why do you say that which you do not do?” Abdullah bin Salam said: “So the Messenger of Allah recited it to us.” Abu Salamah (one of the narrators) said: “So Ibn Salam recited it to us.” Yahya (one of the narrators) said: “So Abu Salamah narrated it to us.” Ibn Kathir said: “So Al-Awza’i recited it to us.” Abdullah said: “So Ibn Kathir recited it to us.”
“The Prophet was standing and delivering a Khutbah for us on one Friday, when a caravan arrived in Al-Madinah. So the Companions of the Messenger of Allah rushed off until only twelve men remained. Among them were Abu Bakr and Umar. And This Ayah was revealed: And when they see some merchandise or some amusement, they disperse headlong to it.”