It is reported on the authority of Talha bin 'Ubaidullah that a person with dishevelled hair, one of the people of Nejd, came to the Messenger of Allah ( صلی اللہ علیہ وسلم ) . We heard the humming of his voice but could not fully discern what he had been saying, till he came nigh to the Messenger of Allah ( صلی اللہ علیہ وسلم ) . It was then (disclosed to us) that he was asking questions pertaining to Islam. The Messenger of Allah ( صلی اللہ علیہ وسلم ) said: Five prayers during the day and the night. (Upon this he said: Am I obliged to say any other (prayer) besides these? He (the Holy Prophet,) said: No, but whatever you observe voluntarily, out of your own free will, and the fasts of Ramadan. The inquirer said: Am I obliged to do anything else besides this? He (the Holy Prophet) said: No, but whatever you do out of your own free will. And the Messenger of Allah ( صلی اللہ علیہ وسلم ) told him about the Zakat (poor-rate). The inquirer said: Am I obliged to pay anything else besides this? He (the Holy Prophet) said: No, but whatever you pay voluntarily out of your own free will. The man turned back and was saying: I would neither make any addition to this, nor will decrease anything out of it. The Prophet ( صلی اللہ علیہ وسلم ) remarked: He is successful, if he is true to what he affirms.