Yahya ibn Ma'in
Yahya ibn Ma'in (Arabic: يحيى بن معين) was an a classical Sunni Islamic scholar. He was a close friend of Imam Ahmad ibn Hanbal He is often quoted regarding Ilm ar-Rijal Imam Yahya ibn Ma’een (rahmatullahi alaih) (died 233 A.H.) was a famous Muhaddith and expert of Rijaal (critical analysis of the narrators of ahadeeth). He taught Imam Bukhari (rahmatullahi alaih) and other muhadditheen. This same Yahya ibn Ma’een (rahmatullahi alaih) attests to the great calibre of Imam Abu Haneefah (rahmatullahi alaih) and says, “He is thiqa (reliable) and trustworthy and I have never heard anyone who regards him to be a weak narrator.