Here is a concise benefit about what sincerity is, that has been extracted from lecture 4 from the series titled: Forty Hadith of Imam al-Nawawi, delivered by Abu Suhailah 'Umar Quinn (hafidhahullah Ta'ala).
May Allah bless us with the correct understanding of his religion with sincerity, Aameen.
Abu Hurairah (رضي الله عنه) narrated that the Prophet ﷺ said: "Whoever invites to guidance will be rewarded like those who follow him in the guidance are rewarded, and that will not decrease the reward of those who have followed him." [Collected by Imām Muslim]
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