Invitation to the Deen of the Final Nabi
Continuing the talk (with Muqauqis, the King of Egypt), Hazrat Haatib (Radhiyallahu anhu) said: “Just as Moosa (Alaihis Salaam) gave the glad tiding of the coming of Isa (Alaihis Salaam), so too did Isa (Alaihis Salaam) give the glad tiding of the coming of Muhammadur Rasulullah (Sallallahu alaihi wasallam).
We are inviting you, just as you invite the People of the Torah to the Injeel. Therefore, just as you accept Moosa (Alaihis Salaam) and the Torah he brought to be the truth, nevertheless you invite people towards Isa (Alaihis Salaam) and the Injeel, similarly, while accepting all the previous Messengers and Scriptures of Allah to be the truth we invite you to follow the present Nabi, Muhammad (Sallallahu alaihi wasallam) and the Divine Book he has brought.
It is an established rule that when a Nabi comes to any nation, that nation becomes his Ummah, and it becomes compulsory upon them to accept and obey their Nabi. Therefore, since you are in the time of the Last Nabi, you should follow him.
It is furthermore necessary to make it clear that we are not setting you up for a religion that is in conflict with the Deen of Isa (Alaihis Salaam). Rather, we are asking you to act upon a cardinal of his religion, that Isa (Alaihis Salaam) foretold the advent of the Prophet of the Last Era and mentioned that his name will be Ahmad. Accordingly, he has arrived, and now in accordance with the command of Isa (Alaihis Salaam), you should follow him.”
(Rasulullah Sallallahu Alaihi Wasallam Kee Saahbzaadiya)