318. hadíth
وَ سُئِلَ أَبُو اَلْحَسَنِ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ: عَنْ قَوْلِ اَللَّهِ عَزَّ وَ جَلَّ: «خُذُوا زِينَتَكُمْ عِنْدَ كُلِّ مَسْجِدٍ» قَالَ «مِنْ ذَلِكَ اَلتَّمَشُّطُ عِنْدَ كُلِّ صَلاَةٍ.
Abu Al-Hasan Imam Ali ibn Musa Ar-Ridha (a.s) was asked about the saying of Allah (swt), the Mighty and Glorious: 'Take your adornment at every place of worship.' (Surah Al-A’raf 7:31). Imam (a.s) said: "Part of that includes combing one's hair before every prayer”.