The Islamic Personality by Sheikh Taqīuddīn An-Nabahānī

The narration of hadīth came to an end after the compilation of ahadīth in the books. After the age of the recording of ahadīth, the age of Bukhari, Muslim and the compilers of the Sunan there is no narration of ahadīth because narration [riwaya] is indicative of transmission [naql] and this transmission came to an end. The transmitters of ahadīth are the Sahabah, the Tabi’een and others. The 'ulamā of hadīth say that whoever saw the Prophet  and believed in him is a sahābi. However, the truth is that the sahābi is whoever has actually realised the meaning of companionship [suhbah]. In a narration from Sa'id ibn al-Musayyab,

Shu'bah related from Musa al-Sibillāni - whom he praised with good - that he said,

All of the Sahābah are trustworthy [‘udūl] because Allah  has praised them in his Book and due to the commendation of their character and actions stated in the prophetic Sunnah. As for the Tabi’een, then a tabi’ī is designated as the one who met a sahābi and narrated from him, even if did not have companionship with him, like Sa'id ibn al-Musayyab, Qays ibn Abī Hāzim, Qays ibn ‘Ubād and Abu Sāsān Husayn ibn al-Mundhir. The history of the transmitters of hadīth has been written and each one has been identified. The Sahabah are not protected from mistakes. Hāfidh al-Dhahabī al-Dimishqī said

As for the Tabi’een, those who would intentionally lie amongst them are almost non-existent. However they made mistakes and misinterpreted. The one whose mistakes were rare bore the consequences and whoever made many mistakes and was of wide knowledge was also forgiven. His hadīth is transmitted and acted upon despite differences amongst the Imāms and even if it was established that they protested to this description such as al-Harith al-A'war, 'Asim ibn Hanbal, Salih the freed slave of al-Tawa’ma, 'Atā ibn al-Sā'ib and their likes. The one who made terrible mistakes and had many isolated cases (tafarrud), his hadīth is not relied upon. This hardly occurs with the early Tabi’een though it was present among the younger Tabi’een and those who came after them. As for the students of the Tabi’een like al-Awzā'i and others they are on the mentioned levels. In their age there were those who would intentionally lie and would make many mistakes; their hadīth would thus be disregarded.

Malik, who is the leading star of the Ummah was not safe from being spoken about. When referred to Malik for evidence and if somebody said that he (Malik) was contested, such person would be rebuked and abused. Al-Awza'i is also a trustworthy and authentic, and he might have been single handed and mistaken (in narration) and his reports from az-Zuhri has defects.