A Selection of Ahadith Relating to the Six Qualities of Da'wat and Tabligh
None is Worthy of Worship But Allah. Muhammad is the Messenger of Allah.
The literal meaning of Iman is to believe in someone's words relying solely on his authority. In religious terms, it implies belief in the Unseen relying solely on the authority of the Messenger of Allah Subhanahu wa Ta'ala.
Verses of Qur'an
Allah Subhanahu wa Ta'ala said to His Prophet:
And We sent no Messenger before you except that We revealed to him: There is none worthy of worship except Me, so worship Me. [Al-Anbiya 21:25]