A--- The first Messenger after the eruption of disagreements and differences regarding the true path of Allah was Nuh (Noah) (Peace be upon him) as explained by Allah the Almighty in the Glorious Qur'an, {Verily, We have sent the revelation to you (O Prophets after him}. (An-Nisa', 163)

Allah the Almighty says: {The people of Nuh (Noah) and the Confederates after them denied (their Messengers) before these}.

(Ghafir, 5)