Al-Kāfi
Hadith 10162ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عُثْمَانَ بْنِ عِيسَى عَنْ سَمَاعَةَ قَالَ سَمِعْتُ أَبَا الْحَسَنِ (عَلَيهِ السَّلام) يَقُولُ لا تَسْتَكْثِرُوا كَثِيرَ الْخَيْرِ وَلا تَسْتَقِلُّوا قَلِيلَ الذُّنُوبِ فَإِنَّ قَلِيلَ الذُّنُوبِ يَجْتَمِعُ حَتَّى يَكُونَ كَثِيراً وَخَافُوا الله فِي السِّرِّ حَتَّى تُعْطُوا مِنْ أَنْفُسِكُمُ النَّصَفَ.
2. A number of our people have narrated from Ahmad ibn Muhammad from ‘Uthman ibn ‘Isa from Sama’a who has said the following: “I heard abu al-Hassan (a.s.) saying, ‘Do not consider a great deal of good a great deal, and do not consider a little sin very little; little sins accumulate and become a great deal. Have fear of Allah in private so you can yield to justice against yourselves.’”