Sunan Ibn Majah Book 5, Hadith 92
The Messenger of Allah (ﷺ) said to
me:
“Do not squat between the two prostrations.”
“When the Messenger of Allah (ﷺ) raised his head from bowing, he would not prostrate until he had stood up straight. When he prostrated, he would raise his head and not prostrate again until he had sat up straight. And he used to spread out his left leg.”
“The Prophet (ﷺ) said: ‘O ‘Ali, do not squat like a dog.’”