The Messenger of Allah ﷺ said: “When anyone of you prostrates let him be balanced in prostration, and not spread his arms as a dog does.” (Using translation from Ibn Mājah 891)
قَالَ رَسُولُ اللهِ ﷺ إِذَا سَجَدَ أَحَدُكُمْ فَلْيَعْتَدِلْ وَلَا يَفْتَرِشْ ذِرَاعَيْهِ افْتِرَاشَ الْكَلْبِ