Arabic (Original)
حَدَّثَنَا يَزِيدُ حَدَّثَنَا شُعْبَةُ عَنْ قَتَادَةَ عَنْ أَنَسِ بْنِ مَالِكٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لِيَعْتَدِلْ أَحَدُكُمْ فِي صَلَاتِهِ وَلَا يَفْتَرِشْ ذِرَاعَيْهِ كَالْكَلْبِ.
English Translation
Yazid told us: Shu'bah told us, from Qatadah, from Anas ibn Malik, that the Prophet, peace and blessings be upon him, said, "Let each of you keep proper posture in his prayer, and not spread his forearms out like a dog."