Arabic (Original)
حَدَّثَنَا يَزِيدُ أَخْبَرَنَا شَرِيكُ بْنُ عَبْدِ اللَّهِ عَنْ مُحَمَّدِ بْنِ عَجْلَانَ عَنِ الْمَقْبُرِيِّ عَنْ كَعْبِ بْنِ عُجْرَةَ قَالَ دَخَلَ عَلَيَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الْمَسْجِدَ وَقَدْ شَبَّكْتُ بَيْنَ أَصَابِعِي فَقَالَ لِي يَا كَعْبُ إِذَا كُنْتَ فِي الْمَسْجِدِ فَلَا تُشَبِّكْ بَيْنَ أَصَابِعِكَ فَأَنْتَ فِي صَلَاةٍ مَا انْتَظَرْتَ الصَّلَاةَ.
English Translation
Yazid told us, Sharik ibn Abdullah informed us from Muhammad ibn Ajlan from al-Maqburi from Ka'b ibn 'Ujrah who said: The Messenger of Allah, peace and blessings be upon him, entered the mosque upon me while I had interlaced my fingers together. He said to me, "O Ka'b, when you are in the mosque, do not interlace your fingers, for as long as you are waiting for the prayer, you are in a state of prayer."