Sayyiduna Talhah bin Ubaydullah (may Allah be pleased with him) said that a Bedouin with dishevelled hair came to him (peace and blessings be upon him) and said: O Messenger of Allah! Tell me how many prayers Allah has made obligatory upon me. He (peace and blessings be upon him) said: "Five prayers, unless you pray something voluntarily." Then he said: How many fasts has Allah made obligatory upon me? He (peace and blessings be upon him) said: "The fasts of Ramadan, unless you observe some voluntary fasts." Then he said: Tell me how much zakah Allah has made obligatory upon me. He (peace and blessings be upon him) informed him of the ordinances of Islam. He said: By the One who has honoured you, I will neither do more than this nor less than what Allah has made obligatory upon me. The Prophet (peace and blessings be upon him) said: "This man has succeeded if he has spoken the truth. By Allah, he will enter Paradise if he has spoken the truth."
(b) Isma'il bin Ja'far (may Allah have mercy on him) mentioned these words: that man will enter Paradise if he has spoken the truth.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4446