Sunan at-Tirmithiy كتاب الصلاة باب ما جاء فى الاعتدال فى السجود
حَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ حَدَّثَنَا أَبُو دَاوُدَ أَخْبَرَنَا شُعْبَةُ عَنْ قَتَادَةَ قَالَ سَمِعْتُ أَنَسًا يَقُولُ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ اعْتَدِلُوا فِى السُّجُودِ وَلاَيَبْسُطَنَّ أَحَدُكُمْ ذِرَاعَيْهِ فِى الصَّلاَةِ بَسْطَ الْكَلْبِ. قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ.
Anas Ibn-Mālik said, "The Messenger of God, peace and blessings of God be upon him, said, 'Be moderate in prostration(1), and let none of you stretch out his forearms (on the ground) in prayer like a dog does.(2)'"
(1) Meaning, take a median position between stretching out and contraction when prostrating. (2) i.e. with elbows touching the ground.
