Jami` at-Tirmidhi Book 10, Hadith 94
"A funeral (procession) passed by the Messenger of Allah and they were praising him with good statements. So the Messenger of Allah said: 'Granted.' Then he said: 'You are Allah's witnesses on the earth.'"
"The Prophet entered a grave during the night, so a torch was lit for him. He took it (the deceased) in from the direction of the Qiblah, and he said: 'May Allah have mercy upon you, you were often invoking (Allah) by reciting the Qur'an.' And he said: 'Allahu Akbar four times."
"I arrived in Al-Madinah and while I was sitting with Umar bin Al-Khattab they passed by with a funeral, over (a person) whom they were praising with good. Umar said: 'Granted.' I said to Umar: 'What is granted?' He said: 'I said as the Messenger of Allah said: "There is no Muslim about whom three bear witness, except that he is granted Paradise." He said: "And two (as well)." He said: 'We did not ask the Messenger of Allah about one.'"