What is the long Hadith of the Trumpet blasts and what is its authenticity, and is it the long Hadith of Intercession?

The lengthy Hadith of the Trumpet and the lengthy Hadith of Intercession are two distinct hadiths that share some common meanings. The lengthy Hadith of the Trumpet was narrated by Ibn Kathir in Al-Bidayah wa An-Nihayah. It describes the creation of the Trumpet and its three blasts: the blast of terror (Al-Faza'), the blast of swooning (As-Sa'q), and the blast of standing before the Lord of all creation (Al-Qiyam li Rabbil-'Alamin). Its chain of narration is weak and contains Munkar (denounced) elements, but most of its wordings are established through other chains of narration. As for the lengthy Hadith of Intercession, it was narrated by Al-Bukhari and Muslim. It describes people's quest for intercession from the prophets (Adam, Noah, Abraham, Moses, Jesus), their refusal due to their sins, until they reach Prophet Muhammad, peace be upon him, who then intercedes for them.