A shorter version of the answer was posted on his Twitter account.
I am posting a more complete version of the audio posted above, with the full consent of our Ustadh (hafidhahullah Ta'ala).
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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