The Messenger of Allah (ﷺ) forbade three things: "Pecking like a crow, resting one's forearms on the ground like a predator, and allocating the same place for prayer like a camel gets used to a certain place."
Sunan an-Nasa'i Book 12, Hadith 84
← Previous Hadith "The Messenger of Allah (ﷺ) said: 'No prayer is valid in which a man does not maintain his back (at ease) when bowing and prostrating.'"

Sunan an-Nasa'i Book 12, Hadith 83 Next Hadith → The Messenger of Allah (ﷺ) said: "I have been commanded to prostrate on seven and not to tuck up my hair or garment."

Sunan an-Nasa'i Book 12, Hadith 85