صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الأذان والإقامةChapters on Adhan and Iqamah
(93) بَابُ ذِكْرِ الدَّلِيلِ عَلَى أَنَّ الِالْتِفَاتَ الْمَنْهِيَّ عَنْهُ فِي الصَّلَاةِ الَّتِي تَكُونُ صَلَاةُ الْمَرْءِ بِهِ نَاقِصَةً هُوَ أَنْ يَلْوِيَ الْمُلْتَفِتُ عُنُقَهُ،Chapter 93: Evidence that the prohibited turning in prayer is to turn the neck
Hadith Q485
لَا أَنْ يَلْحَظَ بِعَيْنِهِ يَمِينَا وَشِمَالًا مِنْ غَيْرِ أَنْ يَلْوِيَ عُنُقَهُ، إِذِ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَدْ كَانَ يَلْتَفِتُ فِي صَلَاتِهِ مِنْ غَيْرِ أَنْ يَلْوِيَ عُنُقَهُ خَلْفَ ظَهْرِهِ.
By this, it is not meant to glance to the right or left without turning the neck, because the Prophet ﷺ would sometimes, when necessary, turn during his prayer without turning his neck behind his back.
