عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ إِنَّكُمْ لَتَعْمَلُونَ أَعْمَالًا هِيَ أَدَقُّ فِي عَيْنِكُمْ مِنَ الشَّعْرِ كُنَّا نَعُدُّهَا عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مِنَ الْمُوبِقَاتِ
It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says: Indeed, you are performing such deeds which, in your view, are finer than a hair (i.e., you consider them extremely insignificant), whereas in the blessed era of the Messenger of Allah (peace and blessings be upon him), we used to count them among the destructive matters.