What is The Obligation Towards the Messenger of Allah (May the peace and blessings be upon him) ?

It is evident from the saying of Allāh, the Almighty and Exalted: ﴾ And whoever seeks a religion other than Islām, it will never be accepted of him ﴿ Āl-‘Imrān 3:85 And from His saying, the Almighty and Exalted “And let those who oppose the Messenger's commandment (i.e., his Sunnah legal ways, orders, acts of worship, statements, etc.) beware, lest some fitnah befall them or a painful torment be inflicted on them” [An-Nūr (24):63]. And from His saying “And whatsoever the Messenger (Muhammad ﷺ) gives you, take it, and whatsoever he forbids you, abstain (from it)” [Al- Hashr 59:7]. So, it is obligatory upon the entire ummah (Muslim nation) to follow the Prophet ﷺ. if Mūsā, ‘Īsā, or other than them were alive, they wouldn’t have any choice except to follow him, because he was sent to all of mankind. “Say (O Muhammad ﷺ) O mankind! Verily, I am sent to you all as the Messenger of Allāh” [Al-A’rāf (7):158].” Therefore, what is obligatory upon all the ummah, men and women, Arab and non-Arab, and jinn and human is to follow him ﷺ and to obey his religion/legislation in accordance with what has come in the great Qur’ān and the pure sunnah. And they are not exempted from that [i.e., following the Prophet ﷺ].