Abu Awanah says: When Hasan al-Basri passed away, I desired to know his sayings. I searched for the companions of Hasan al-Basri and came to Aban ibn Abi Ayyash. He narrated to us ahadith, all of them from Hasan al-Basri. I do not consider it permissible to narrate any of them.

Imam Tirmidhi says: Despite the negligence and weakness of Aban bin Abi Ayyash, many Imams have narrated from him, as Abu Awanah and others have said. So if trustworthy people narrate from him, one should not be deceived by this, because it is narrated from Ibn Sirin that a man narrates a hadith to me, so I do not accuse him, rather I accuse the narrator above him.

It is narrated from several people that Ibrahim Nakha'i narrates from Alqama, and Alqama narrates from Abdullah bin Mas'ud that the Prophet Muhammad (peace be upon him) used to recite Qunoot in Witr before bowing (ruku).

And it is narrated from Aban ibn Abi Ayyash that the Prophet Muhammad (peace be upon him) used to recite Qunoot in Witr before bowing (ruku’). Sufyan Thawri has narrated similarly from Aban ibn Abi Ayyash.

Tirmidhi says: Although Aban bin Abi Ayyash is described with the qualities of worship, asceticism, and spiritual exercise, this is his condition in hadith, and the group of hadith scholars were people of memorization. Sometimes it happens that a person is pious and righteous, but he can neither testify nor remember (the narration). Therefore, according to the preferred view of the majority of the people of hadith, a narrator who is accused of lying or a heedless narrator who makes frequent mistakes, hadith will not be narrated from such narrators. Do you not see that Abdullah bin Mubarak narrated hadith from a group of scholars, but when their conditions became clear, he abandoned narrating from them?

Salih bin Abdullah Tirmidhi says: We were with Abu Muqatil Samarqandi, and he began narrating lengthy hadiths regarding the advice of Luqman, the killing of Sa'id bin Jubair, and similar things from 'Awn bin Abi Shaddad. Abu Muqatil's nephew said to him: Uncle! Do not say that 'Awn narrated hadith to us, because in reality you have not heard anything from him. He said: Son! This is good speech.

Tirmidhi says: I heard Jarud say: We were with Abu Muawiyah when the hadith of Abu Muqatil was mentioned to him, that Abu Muqatil narrated from Sufyan Thawri, and Thawri from A’mash, and A’mash from Abu Zubyan. Abu Zubyan says that Ali (may Allah be pleased with him) was asked about the hive of bees, so he said: There is no harm in it; it is like the game of the sea. Abu Muawiyah said: I will not say that your companion (meaning Abu Muqatil) is a liar, but this hadith is a lie.

Some Ahl al-Hadith criticized a group of eminent scholars, declaring them weak due to deficiencies in their memory, while other Imams authenticated them because of their truthfulness and high status, even though there are some errors in their narrations.

Yahya bin Saeed Al-Qattan criticized Muhammad bin Amr, then narrated from him.