Al-Kāfi - Volume 6 > Clipping the finger Nails
Hadith #12

عَنْهُ عَنِ ابْنِ فَضَّالٍ عَنْ عَلِيِّ بْنِ عُقْبَةَ عَنْ أَبِيهِ قَالَ أَتَيْتُ عَبْدَ اللَّهِ بْنَ الْحَسَنِ فَقُلْتُ عَلِّمْنِي دُعَاءً فِي الرِّزْقِ فَقَالَ قُلِ اللَّهُمَّ تَوَلَّ أَمْرِي وَ لَا تُوَلِّ أَمْرِي غَيْرَكَ فَعَرَضْتُهُ عَلَى أَبِي عَبْدِ اللَّهِ ( عليه السلام ) فَقَالَ أَ لَا أَدُلُّكَ عَلَى مَا هُوَ أَنْفَعُ مِنْ هَذَا فِي الرِّزْقِ تَقُصُّ أَظَافِيرَكَ وَ شَارِبَكَ فِي كُلِّ جُمُعَةٍ وَ لَوْ بِحَكِّهَا .

12. It is narrated from the narrator of the previous Hadith from ibn Faddal from Ali ibn ‘Uqbah from his father who has said the following: “I once visited ‘Abd Allah ibn al-Hassan and asked him to teach me a prayer for increased sustenance. He told me to say, ‘O Lord, take charge of my affairs and do not make others the in-charge person of my affairs.’ I mentioned it to abu ‘Abd Allah, ‘Alayhi al-Salam, and he (the Imam) said, ‘May I teach you something more useful than that for increased sustenance? Clip your fingernails and mustache every Friday.’”