Meezan: List Of Sunnah
Sunnah is present in Amali tawatur and Ijma of Muslims which can be traced back to Sahaba ( who acquired it from Prophet and transmitted it to next generation with their consensus ). This is done through books of ‘ fiqh ‘ which are documenting ijma and tawatur of every time period. Akhbar-i-Ahad do contain application of both Sunnah and Quranic directives, but they are not source for either of them. Please refer to the following response which covers the topic of Sunnah comprehensively : Discussion 50126 • Reply 50134