Is there leniency in the attribution of traditions reported from the Companions and the Successors—if they contain a truthful narrator with poor memory, or a truthful narrator who makes errors and practices tadlis (deceptive reporting), or one who is "acceptable"—unlike the marfu' (prophetically attributed) traditions, such that this leads to judging them as established and authentic?

We have not found a direct text indicating leniency regarding the narrations attributed to the Companions and their Successors. Rather, we have found what contradicts this, such as the statement of Sheikh al-Islam Ibn Taymiyyah on the necessity of verifying the authenticity of the wording in what is transmitted from the Salaf.

However, leniency in attributing sayings to the Companions and their Successors with a probable chain of transmission is less severe than attributing them to the Prophet, peace be upon him. Some scholars may act upon this in matters other than rulings, such as Ibn Qudamah and Al-Nawawi, being lenient in their chains of transmission.

It remains that leniency in narrating Hadith that does not pertain to halal and haram includes the narrations of the Companions a fortiori. Thus, leniency can be applied to them in matters other than rulings. This includes supplications, encouragement, discouragement, exegesis, and military campaigns, as Al-Bayhaqi mentioned on the authority of Ibn Mahdi.