Riyad as-Salihin 73

I heard Messenger of Allah (sallallahu alayhi wa sallam) during the sermon of the Farewell Pilgrimage saying, “Be mindful of your duty to Allah; perform your five daily Salat, observe Saum during the month (of Ramadan), pay the Zakat on your properties and obey your leaders; (if you do so) you will enter the Jannah of your Rubb”.