Where is the son of Abdul Muttalib?
Called out on arriving in Madinah as the envoy of Banu Sa'd ibn Bakr, tying his camel at the door of the masjid and striding straight in.
I am the son of Abdul Muttalib.
You are Muhammad ﷺ?
Yes, I am Muhammad ﷺ.
I will ask you, and I will be very tough with you, but don't get angry with me.
Go ahead.
Your envoy came to us, and he told us that Allah has sent you.
He has spoken the truth.
Who created the heavens? Who created the earth? Who created the mountains? Who put everything here?
Allah.
So I ask you by the One who created the heavens, the One who created the earth, the One who created the mountains, the One who placed everything here: I ask you by Allah, are you swearing that Allah has sent you to us?
I swear by Allah, I have been sent by Allah.
Your envoy also said that we have to pray 5 times a day. So I ask you by the One who has sent you, did Allah command you to tell us to pray 5 times a day?
Yes.
The same series of questions, sworn the same way, went on about zakat, fasting, and Hajj; Hajj's mention marks this exchange as taking place in the 9th year of the Hijrah.
Do I have to pray anything more than the fard 5 prayers?
No, unless you want to.
Do I have to pay one bit more zakat? Do I have to fast one day outside of Ramadan?
No, unless you want to.
I swear by the One who has sent you with the Truth that I shall follow this and not increase one bit or decrease one bit.
Returned to his people and, that very day, destroyed the idol they had worshipped, calling his tribe to Islam.