Talhah bin Ubaidullah (May Allah be pleased with him) reported: A person with dishevelled hair, one of the people of Najd, came to the Messenger of Allah Sallallahu Alyhi Wa Sallam. We heard the humming of his voice but could not fully understand what he was saying, till he approached close to the Messenger of Allah Sallallahu Alyhi Wa Sallam. Then I came to know that he was asking about Islam.

The Messenger of Allah Sallallahu Alyhi Wa Sallam said: "There are five (obligatory) Salaah during the day and the night." He said: "Am I obliged to perform any other (Salaah) besides these?'' The Messenger of Allah Sallallahu Alyhi Wa Sallam said, "No, but whatever you observe voluntarily.'' He Sallallahu Alyhi Wa Sallam added, "There is the Saum of Ramadan.'' The inquirer asked: "Am I obliged to do anything besides this?'' The Messenger of Allah Sallallahu Alyhi Wa Sallam said, "No, but whatever you do out of your own free will. You may observe voluntary fasting.'' And the Messenger of Allah Sallallahu Alyhi Wa Sallam told him about the Zakaah (obligatory charity).

The inquirer asked: "Am I obliged to pay anything besides this?'' The Messenger of Allah Sallallahu Alyhi Wa Sallam said, "No, but whatever you pay voluntarily out of your own free will.'' That man turned back saying: "By Allah! I will neither make any addition to this nor will I decrease anything from it.'' (Upon hearing this) the Messenger of Allah Sallallahu Alyhi Wa Sallam remarked, "He is successful if he proves truthful (to what he is saying).'' [Al-Bukhari and Muslim]

Commentary: This Hadith highlights the following three points:

1. The status of some of the important obligations and voluntary prayers.

2. By mentioning practice with the precepts, it has made the fact evident that the two are inseparable.

3. It indicates the sagacious mode of preaching and invitation, and tells that ordinary people should be first of all taught the obligations of Islam and then gradually told to follow the Sunnah and Mustahabbat (desirable acts).