Call to Prayers (Adhaan)
10/141. Chapter:
One should not put the forearms on the ground during prostrations
وَقَالَ أَبُو حُمَيْدٍ سَجَدَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَوَضَعَ يَدَيْهِ غَيْرَ مُفْتَرِشٍ وَلاَ قَابِضِهِمَا.Abu Humaid said: The Prophet ﷺ prostrated and put his hands (on the ground) with the forearms away from the ground and away from the body.
Sahih Bukhari
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ سَمِعْتُ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " اعْتَدِلُوا فِي السُّجُودِ، وَلاَ يَبْسُطْ أَحَدُكُمْ ذِرَاعَيْهِ انْبِسَاطَ الْكَلْبِ ".
Narrated Anas bin Malik: The Prophet (ﷺ) said, "Be straight in the prostrations and none of you should put his forearms on the ground (in the prostration) like a dog."
Reference : Sahih al-Bukhari 822In-book reference : Book 10, Hadith 216USC-MSA web (English) reference : Vol. 1, Book 12, Hadith 785