Sabr (steadfastness) is mentioned in the Qur'ān in more than seventy places. This is because of the tremendous importance that steadfastness has in the dīn. It has been said that every good action has a limited reward, from ten-fold up to seven-hundred fold, except for steadfastness whose reward has no limit. That is because of Allāh's words "Only the steadfast are paid their reward without reckoning."
Imām Ibn Juzayy al-Kalbī