 ١٢ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ الله عَنْ آبَائِهِ (عَلَيْهم السَّلام) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) السُّنَّةُ سُنَّتَانِ سُنَّةٌ فِي فَرِيضَةٍ الاخْذُ بِهَا هُدًى وَتَرْكُهَا ضَلالَةٌ وَسُنَّةٌ فِي غَيْرِ فَرِيضَةٍ الاخْذُ بِهَا فَضِيلَةٌ وَتَرْكُهَا إِلَى غَيْرِ خَطِيئَةٍ.
12. Ali ibn Ibrahim has narrated from his father from al-Nawfali from al-Sakuni from abu ‘Abdallah from his ancestors (the Imams  who have said the following.

“Imam Ali  said, ‘There are two kinds of Sunnah, (traditions). There is a Sunnah in obligations and following such Sunnah is guidance and its disregard is misguidance. There is a Sunnah, (tradition), in none obligatory issue. The following of this kind of Sunnah is a virtuous deed and its disregard for other matters is a sin.’”