Anas bin Malik reported,

He said, "We were forbidden from asking the Messenger of Allah ﷺ about anything, so it used to please us when an intelligent man from the desert dwellers would come and ask him while we listened."A man from the desert dwellers came and said, "Muhammad, your messenger came to us and claimed that you claim Allah has sent you."He replied, "He spoke the truth."The man asked, "Who created the heaven?"He answered, "Allah."The man asked, "Who created the earth?"He answered, "Allah."The man asked, "Who erected these mountains and placed in them what He placed?"He answered, "Allah."The man said, "By the One who created the heaven, created the earth, and erected these mountains, has Allah sent you?"He replied, "Yes."The man said, "Your messenger claimed that we are obligated to perform five prayers in our day and night."He replied, "He spoke the truth."The man asked, "By the One who sent you, has Allah commanded you with this?"He answered, "Yes."The man said, "Your messenger claimed that we are obligated to pay zakat on our wealth."He replied, "He spoke the truth."The man asked, "By the One who sent you, has Allah commanded you with this?"He answered, "Yes."The man said, "Your messenger claimed that we are obligated to fast the month of Ramadan in our year."He replied, "He spoke the truth."The man asked, "By the One who sent you, has Allah commanded you with this?"He answered, "Yes."The man said, "Your messenger claimed that we are obligated to perform pilgrimage to the House, for whoever is able to find a way to it."He replied, "He spoke the truth."Then the man turned away saying, "By the One who sent you with the truth, I will not add to them nor diminish from them."The Prophet ﷺ then said, "If he has spoken truthfully, he will surely enter Paradise."

عن أنس بن مالك

قال نهينا أن نسأل رسول الله ﷺ عن شيء، فكان يعجبنا أن يجيء الرجل من أهل البادية العاقل، فيسأله ونحن نسمع فجاء رجل من أهل البادية فقال: يا محمد! أتانا رسولك فزعم لنا أنك تزعم أن الله أرسلك قال: صدق قال: فمن خلق السماء؟ قال: الله. قال: فمن خلق الأرض؟ قال: الله قال: فمن نصب هذه الجبال، وجعل فيها ما جعل؟ قال: الله. قال: فبالذي خلق السماء وخلق الأرض ونصب هذه الجبال، آلله أرسلك؟ قال: نعم. قال: وزعم رسولك أن علينا خمس صلوات في يومنا وليلتنا؟ قال: صدق. قال: فبالذي أرسلك آلله أمرك بهذا؟ قال: نعم. قال: وزعم رسولك أن علينا زكاة في أموالنا؟ قال: صدق. قال: فبالذي أرسلك، آلله أمرك بهذا؟ قال: نعم. قال: وزعم رسولك أن علينا صوم شهر رمضان في سنتنا؟ قال: صدق. قال: فبالذي أرسلك، آلله أمرك بهذا؟ قال: نعم قال: وزعم رسولك أن علينا حج البيت من استطاع إليه سبيلا؟ قال: صدق قال: ثم ولى، قال: والذي بعثك بالحق لا أزيد عليهن ولا أنقص منهن فقال النبي ﷺ: لئن صدق ليدخلن الجنة.