A hadlth like this has been transmitted on the authority of Ibn Shibab who said that they (the Compnions of the Holy Prophet) followed the latest of his commands and looked upon it as one abrogating (the previous ones) and the most firm.
وَحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، بِهَذَا الإِسْنَادِ مِثْلَ حَدِيثِ اللَّيْثِ . قَالَ ابْنُ شِهَابٍ فَكَانُوا يَتَّبِعُونَ الأَحْدَثَ فَالأَحْدَثَ مِنْ أَمْرِهِ وَيَرَوْنَهُ النَّاسِخَ الْمُحْكَمَ .
Muslim
The Book of Fasting • Hadith 113