Sahl bin Sa'd (May Allah be pleased with him) reported:
The Prophet ﷺ said to 'Ali (May Allah be pleased with him), "By Allah, if a single person is guided by Allah through you, it will be better for you than a whole lot of red camels."

[Al-Bukhari and Muslim].

وعن سهل بن سعد رضي الله عنه أن النبي ﷺ قال علي رضي الله عنه : "فوالله لأن يهدي الله بك رجلا واحدا خير من حمر النعم" ((متفق عليه))