Hadith ~ Guide one man

Sahl ibn Sa'd reported that the Prophet, may Allah bless him and grant him peace, said to 'Ali, "By Allah, for Allah to guide one man by you is better for you than red camels." [Agreed upon]

Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Anyone who calls others to guidance will have the same reward as those who follow him, without that decreasing their reward in any way." [Muslim]

Riyad as-Salihin (The Meadows of the Righteous) of Iman Mohieddine Annawawi 631-676.  Chapter 241: "The excellence of knowledge ", Hadith 1 No: 1379 and Hadith 2 Number: 1382