Riyad as-Salihin, Book 13, Hadith 1382 (In-Book) ⓘ
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah said, "He who calls others to follow the Right Guidance will have a reward equal to the reward of those who follow him, without their reward being diminished in any respect on that account."[Muslim].
وعنه أيضًا رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: "من دعا إلى هدى كان له من الأجر مثل أجور من تبعه لا ينقص ذلك من أجورهم شيئًا ((رواه مسلم)).