Al-Kāfi - Volume 5 > Promoting The Quest For Sustenance And Work To Make A Living
Hadith #6

6- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي خَالِدٍ الْكُوفِيِّ رَفَعَهُ إِلَى أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) قَالَ قَالَ رَسُولُ اللهِ (صَلَّى اللهُ عَلَيْهِ وَآلِه) الْعِبَادَةُ سَبْعُونَ جُزْءاً أَفْضَلُهَا طَلَبُ الْحَلالِ.

6. A number of our people have narrated from Sahl ibn Ziyad from Ibn Mahbub from abu Khalid al-Kufiy in a marfu’ manner from abu Ja’far who has said the following: “Abu Ja’far, ‘Alayhi al-Salam, has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘Worship has seventy parts. The most excellent part in it is working to make lawful living.’”