Arabic (Original)
حَدَّثَنَا مُحَمَّدُ بْنُ يَزِيدَ عَنْ أَيُّوبَ يَعْنِي الْقَصَّابَ أَبِي الْعَلَاءِ عَنْ قَتَادَةَ عَنْ أَنَسٍ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَا يَفْتَرِشْ أَحَدُكُمْ ذِرَاعَيْهِ فِي الصَّلَاةِ كَالْكَلْبِ.
English Translation
Muhammad ibn Yazid told us, from Ayyub - meaning al-Qassab Abu al-‘Ala’ - from Qatadah, from Anas, from the Prophet, peace and blessings be upon him, who said, "Let none of you spread out his forearms in prayer like a dog."