عَنْ كَعْبِ بْنِ عُجْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: دَخَلَ عَلَيَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ الْمَسْجِدَ وَقَدْ شَبَّكْتُ بَيْنَ أَصَابِعِي، فَقَالَ لِي: ((يَا كَعْبُ! إِذَا كُنْتَ فِي الْمَسْجِدِ فَلَا تُشَبِّكْ بَيْنَ أَصَابِعِكَ، فَأَنْتَ فِي صَلَاةٍ مَا انْتَظَرْتَ الصَّلَاةَ))
Sayyiduna Ka’b bin ‘Ujrah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) came to me in the mosque while I had interlaced my fingers. He (peace and blessings be upon him) said to me: O Ka’b! When you are in the mosque, do not interlace your fingers, because as long as you are waiting for the prayer, you are considered to be in prayer.