It is reported that Harim b. Hayyān – Allāh have mercy on him – said:

Never does the servant turn wholeheartedly to Allāh except that Allāh turns the hearts of the believers to him, providing him their love.

Al-Dhahabī, Siyar A’lām Al-Nubalā` 4:49.

Harim b. Hayyān was one of the Successors, deputized by ‘Umar, and known for his devoutness.