What teachings did Prophet Muhammad (saw) transmit to his followers according to the hadith conveyed through the chain of narrators from Abu Bakr b. Abi Shaiba, Ishaq b. Ibrahim, Harun b. Abdullah, Abi Usama, Walid b. Kathir, Muhammad b. Ka'b, his brother Abdullah b. Ka'b and Abi Usama?
 This hadith has been transmitted by another chain of narrators:                      Abu Bakr b. Abi Shaiba, Ishaq b. Ibrahim, Harun b. Abdullah, Abi Usama, Walid b. Kathir, Muhammad b. Ka'b, his brother Abdullah b. Ka'b and Abi Usama.