Jami` at-Tirmidhi 251

Al-Hasan narrated that :Samurah said: "there are two pauses that I preserved from Allah's Messenger." But Imran bin Husain rejected that and said: "We preserved one pause." "So we wrote to Ubayy bin Ka'b in Al-Madinah. Ubayy wrote that Samurah was correct." Sa'eed said: "We said to Qatadah: 'What are those two pauses?' He said: 'When he entered into his Salat, and when he finished his recitation.' Then he (Qatadah) said after that: 'And when he recited (Nor those who went astray.)' And he said: 'He liked to pause when he finished the recitation until he caught his breath