Arabic (Original)
حَدَّثَنَا وَكِيعٌ حَدَّثَنَا سَعِيدُ بْنُ زِيَادٍ عَنْ زِيَادِ بْنِ صُبَيْحٍ الْحَنَفِيِّ قَالَ صَلَّيْتُ إِلَى جَنْبِ ابْنِ عُمَرَ فَوَضَعْتُ يَدِي عَلَى خَاصِرَتِي فَضَرَبَ يَدَيَّ فَلَمَّا صَلَّى قَالَ هَذَا الصَّلْبُ فِي الصَّلَاةِ وَكَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَنْهَى عَنْهُ.
English Translation
Waki' told us: Sa'id ibn Ziyad told us, from Ziyad ibn Subayh al-Hanafi, who said: I prayed next to Ibn Umar, and I placed my hand on my waist, so he struck my hands. When he finished praying he said: This is the crucifixion-posture in prayer, and the Messenger of Allah, peace and blessings be upon him, used to forbid it.