[Machine] The Prophet ﷺ said to him, "O Ka'b, when you perform ablution and perfect it, then go out to the mosque, do not intertwine your fingers, for indeed you are in prayer." This hadith has a sound chain of narration, if it was Al-Hasan bin Ali Ar-Raqqi who narrated it, this is his preservation, and I did not find it in what he reported.
أَنَّ النَّبِيَّ ﷺ قَالَ لَهُ يَا كَعْبُ إِذَا تَوَضَّأْتَ فَأَحْسَنْتَ الْوُضُوءَ ثُمَّ خَرَجْتَ إِلَى الْمَسْجِدِ فَلَا تُشَبِّكَنَّ بَيْنَ أَصَابِعِكَ فَإِنَّكَ فِي صَلَاةٍ هَذَا إِسْنَادٌ صَحِيحٌ إِنْ كَانَ الْحَسَنُ بْنُ عَلِيٍّ الرَّقِّيُّ هَذَا حَفَظَهُ وَلَمْ أَجِدْ لَهُ فِيمَا