The covenant of all Prophets is referenced in which Surah?

The covenant of all Prophets (Mithaq an-Nabiyyin) is referenced in Surah Al-Ahzab. Specifically, verse 7 of Surah Al-Ahzab (33:7) states: "And [mention, O Muhammad], when We took from the prophets their covenant and from you and from Nuh and Ibrahim and Musa and Isa, the son of Maryam; and We took from them a solemn covenant."

This verse describes the covenant (mithaq) that Allah took from all the prophets, with five of the greatest prophets (Ulul-Azm, the Prophets of Strong Will) mentioned by name: Muhammad (SAW), Nuh, Ibrahim, Musa, and Isa (AS). The covenant required each prophet to affirm the truth of Allah's message and to support one another's mission. Surah Al-Imran (3:81) also discusses a related covenant where prophets were asked to believe in and support any messenger who came after them confirming what they had.

While the covenant concept appears in Surah Al-Imran (3:81) as well, the specific verse that enumerates the prophets and their solemn covenant together is in Surah Al-Ahzab. Al-Ma'idah and Al-Tawbah deal with other aspects of Islamic law and practice but are not the primary location for the collective prophetic covenant.