رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 173
The Book of Miscellany
Calling to right guidance and forbidding depravity
وَعَنْ أَبِي مَسْعُودٍ عُقْبَةَ بْنِ عَمْرٍو الْأَنْصَارِيِّ البدي رَضِيَ اللَّه عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ: مَنْ دَلَّ عَلَى خَيْرٍ فَلَهُ مثل أجر فَاعله ((رَوَاهُ مُسلم)).
Abu Mas'ud 'Uqbah bin 'Amr Al-Ansari Al-Badri (May Allah be pleased with him) reported: Messenger of Allah (ﷺ) said, "Whoever guides someone to virtue will be rewarded equivalent to him who practices that good action". [Muslim].
Riyad as-Salihin, 173