Anas reported the Messenger of Allah ﷺ as saying; Adopt a moderate position when prostrating yourselves, and see that none of you stretches out his forearms(on the ground) like a dog. (Using translation from Abū Dāʾūd 897)
قَالَ رَسُولُ اللَّهِ ﷺ «اعْتَدِلُوا فِي السُّجُودِ وَلَا يَفْتَرِشْ أَحَدُكُمْ ذِرَاعَيْهِ افْتِرَاشَ الْكَلْبِ»