Mentioning the differences in the reports from Muhammad bin Abi Yaqub in the Hadith of Abi Umamah About The Virtue Of Fasting
أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمٍ، قَالَ أَنْبَأَنَا حِبَّانُ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ مِسْعَرٍ، عَنِ الْوَلِيدِ بْنِ أَبِي مَالِكٍ، قَالَ حَدَّثَنَا أَصْحَابُنَا، عَنْ أَبِي عُبَيْدَةَ، قَالَ الصِّيَامُ جُنَّةٌ مَا لَمْ يَخْرِقْهَا .
It was narrated that Al-Walid bin Abi Malik said: "Our companions narrated to us that Abu 'Ubaidah said: 'Fasting is a shield, so long as you do not damage it."'