Sunan Ibn Majah, Volume 2, Book 5, Hadith 891 (DarusSalam) ⓘ
It was narrated that Jabir said: The Messenger of Allah said: “When anyone of you prostrates let him be balanced in prostration, and not spread his arms as a dog does.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي سُفْيَانَ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِذَا سَجَدَ أَحَدُكُمْ فَلْيَعْتَدِلْ وَلاَ يَفْتَرِشْ ذِرَاعَيْهِ افْتِرَاشَ الْكَلْبِ " .
also referenced under: Hadith 891 (Reference) & Book 5, Hadith 941 (In-Book)