"We used to talk behind Allah's Messenger (S) during the Salat, a man among us would talk to his companions next to him until (the following) was revealed: And stand before Allah with obedience. (2:238) So we were ordered to be silent and prohibited from talking."
Jami` at-Tirmidhi Book 2, Hadith 258
← Previous Hadith "I prayed behind Allah's Messenger (S). I sneezed and said: Al-Hamdulillah, hamdan kathiran tayyiban mubarakan fih, mubarakan alaihi kama yuhibbu Rabbana Wa Yarda (All praise is due to Alah, many good blessed praises, blessings for Him as our Lord loves and is pleased with.) When Allah's Messenger (S) prayed and turned (after finishing) he said: 'Who was the speaker during the Salat?' No one spoke. Then he said it a second time: 'Who was the speaker during the Salat?' But no one spoke. Then he said it a third time: 'Who was the speaker during the Salat?'" So Rifa'ah bin Rafi bin Afra said: "It was I, O Messenger of Allah (S)." He said: "What did you say?" He said: "I said: 'Al-Hamdulillah, hamdan kathiran tayyiban mubarakan fih, mubarakan alaihi kama yuhibbu Rabbana Wa Yarda. The Prophet (S) said: "By the One in Whose Hand is my soul! I saw thirty-some angels competing over which of then would ascend with it."

Jami` at-Tirmidhi Book 2, Hadith 257 Next Hadith → "I heard Ali saying: 'Indeed I am a man who, when I heard a Hadith from Allah's Messenger (S) then Allah causes me to benefit from it as much as He wills for me to benefit from it. When a man among his Companions narrated to me I ask him to swear an oath to me about it, and when he swears an oath to me I trust him. And Abu Bakr narrated to me - and Abu Bakr told the truth - he said: "I heard Allah's Messenger (S) saying: 'There is no man who commits a sin, then makes Wudu, then performs Salat, then seeks forgiveness from Allah, except that Allah forgives him.' Then he recited this Ayah: Those who when they have committed Fahishah or wronged themselves with eveil, remember Allah. (3:135) until the end of the Ayah."

Jami` at-Tirmidhi Book 2, Hadith 259