Abdullah bin Khabab عبد الله بن خباب الأنصاري النجاري · Establishing the Prayer and the Sunnah Regarding Them

“The Prophet (ﷺ) said: ‘O ‘Ali, do not squat like a dog.’”

“When anyone of you performs prayer and commits Hadath, (passing wind) let him take hold of his nose, then leave.” Another chain with similar wording.