Prayer (Kitab Al-Salat): Detailed Injunctions about Witr
8/22. Chapter:
Allah Revealed The Qur'an According To Seven Ahruf'
Sunan Abi Dawud
حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ فَارِسٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، قَالَ قَالَ الزُّهْرِيُّ إِنَّمَا هَذِهِ الأَحْرُفُ فِي الأَمْرِ الْوَاحِدِ لَيْسَ تَخْتَلِفُ فِي حَلاَلٍ وَلاَ حَرَامٍ .
Al-Zuhri said: These modes of reading aimed at the same point, not different in respect of lawful and unlawful.
Reference : Sunan Abi Dawud 1476In-book reference : Book 8, Hadith 61English translation : Book 8, Hadith 1471