"Allah's Messenger (S) ordered killing the two black things in Salat; the snake and the scorpion."
Jami` at-Tirmidhi Book 2, Hadith 242
← Previous Hadith "I met Abu Ad-Darda, and I asked him what I had asked Thawban, so he said: 'Perform prostrations, for I heard Allah's Messenger saying: 'No worshipper performs a prostration to Allah except that by it Allah will raise him a level, and erase a sin from him for it.'"

Jami` at-Tirmidhi Book 2, Hadith 241 Next Hadith → "The Prophet (S) stood for the Zuhr prayer, and he had a sitting to perform, so when he completed his Salat, he performed two prostrations, saying the Takbir for each prostration. So he was sitting before saying the Salam, and the people prostrated with him in place of the sitting he forgot."

Jami` at-Tirmidhi Book 2, Hadith 243