Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
حَدَّثَنَا إِسْحَاقُ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ، أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " قِيلَ لِبَنِي إِسْرَائِيلَ {ادْخُلُوا الْبَابَ سُجَّدًا وَقُولُوا حِطَّةٌ نَغْفِرْ لَكُمْ خَطَايَاكُمْ} فَبَدَّلُوا فَدَخَلُوا يَزْحَفُونَ عَلَى أَسْتَاهِهِمْ وَقَالُوا حَبَّةٌ فِي شَعَرَةٍ ".Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "It was said to the children of Israel, 'Enter the gate in prostration and say Hittatun. We shall forgive you your faults.' (7.161) But they changed (Allah's Order) and entered, dragging themselves on their buttocks and said, 'Habbatun (a grain) in a Sha'ratin (hair)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.