أَخْبَرَنَا أَبُو عَاصِمٍ ، عَنْ ثَوْرٍ ، عَنْ خَالِدِ بْنِ مَعْدَانَ ، حَدَّثَنِي عَبْدُ اللَّهِ بْنُ بُسْرٍ ، عَنْ أُخْتِهِ يُقَالُ لَهَا الصَّمَّاءُ ، أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، قَالَ :" لَا تَصُومُوا يَوْمَ السَّبْتِ إِلَّا فِيمَا افْتُرِضَ عَلَيْكُمْ، وَإِنْ لَمْ يَجِدْ أَحَدُكُمْ إِلَّا كَذَا أَوْ لِحَاءَ شَجَرَةٍ فَلْيَمْضَغْهُ "

Abu Asim told us, on the authority of Thawr, on the authority of Khalid bin Maadan, Abdullah bin Busr told me, on the authority of his sister, who is called the deaf, that The Messenger of God, may God bless him and grant him peace, said: “Do not fast on the Sabbath except what is enjoined upon you, even if none of you finds anything except such-and-such or tree, let him chew it.”