The Messenger of Allah ﷺ said, "Be balanced in your prostration, and let none of you spread out his forearms on the ground during prayer the way a dog spreads its legs."
حدثنا محمود بن غيلان حدثنا أبو داود أخبرنا شعبة عن قتادة قال سمعت
إن رسول الله ﷺ قال اعتدلوا في السجود ولا يبسطن أحدكم ذراعيه في الصلاة بسط الكلب
Agreed upon. Bukhari narrated it in the Book of Adhan, Chapter: One Should Not Spread Out His Forearms During Sujud, no. 822, and Muslim narrated it, no. 493, from the hadith of Shubah, transmitted through him. It is also found in Musnad Abu Dawud Tayalisi, no. 1977.