Hazrat Hisham bin Sa’d (may Allah have mercy on him) narrates that Hazrat Zaid bin Aslam (may Allah be pleased with him) said: Four things are essential for the people of religion: entering into the call of Islam, and having faith is necessary, and affirming Allah, and His first and last messengers, and Paradise, Hell, and resurrection after death, and it is necessary to do such deeds that confirm the truthfulness of their faith, and it is necessary to acquire as much knowledge through which their actions become good. Then he (may Allah be pleased with him) recited this verse:“And indeed, I am Most Forgiving to the one who repents and believes and does righteous deeds, then remains guided.”