The Ruling on Being Lenient in Narrating Weak Historical Stories

The questioner : Some historical stories were transmitted by trustworthy scholars, such as Ibn al-Qayyim and his teacher, the Shaykh al-Islam, without chains of narration, and they were accepted by those with a sound disposition. However, if a person looks into their chains of narration, for example, he finds weakness in them. Do such historical stories allow for leniency, unlike hadith? For instance, the story of Khalid al-Qasri and al-Ja'd ibn Dirham regarding his slaughter on the day of Eid? One who examines the Sunnah finds weakness in it, and if he sees that the scholars of knowledge have dealt with it and accepted it, it gives the impression that they are accepting it.

The Shaykh : The scholars of knowledge say regarding hadith: if a hadith becomes famous and is accepted by the scholars of knowledge, it has the ruling of a connected, authentic hadith. This is the same case. This is the hadith of the Messenger (peace and blessings be upon him); what about the other hadiths?