I visited Allah's Messenger (ﷺ) while he was suffering from a high fever. I said, "O Allah's Messenger (ﷺ)! You
have a high fever." He said, "Yes, I have as much fever as two men of you." I said, "Is it because you
will have a double reward?" He said, "Yes, it is so. No Muslim is afflicted with any harm, even if it
were the prick of a thorn, but that Allah expiates his sins because of that, as a tree sheds its leaves."
Sahih al-Bukhari Book 75, Hadith 8
Allah's Messenger (ﷺ) addressed us and said: O people, Allah has made Hajj obligatory for you; so perform Hajj. Thereupon a person said: Messenger of Allah, (is it to be performed) every year? He (the Holy Prophet) kept quiet, and he repeated (these words) thrice, whereupon Allah's Messenger (ﷺ) said: If I were to say" Yes," it would become obligatory (for you to perform it every year) and you would not be able to do it. Then he said: Leave me with what I have left to you, for those who were before you were desroyed because of excessive questioning, and their opposition to their apostles. So when I command you to do anything, do it as much as it lies in your power and when I forbid you to do anything, then abandon it.
Sahih Muslim Book 15, Hadith 461
The Prophet (ﷺ) delivered to us a sermon on the Day of Nahr. He said, "Do you know what is the day
today?" We said, "Allah and His Apostle know better." He remained silent till we thought that he
might give that day another name. He said, "Isn't it the Day of Nahr?" We said, "It is." He further
asked, "Which month is this?" We said, "Allah and His Apostle know better." He remained silent till
we thought that he might give it another name. He then said, "Isn't it the month of Dhul-Hijja?" We
replied: "Yes! It is." He further asked, "What town is this?" We replied, "Allah and His Apostle know
it better." He remained silent till we thought that he might give it another name. He then said, "Isn't it
the forbidden (Sacred) town (of Mecca)?" We said, "Yes. It is." He said, "No doubt, your blood and
your properties are sacred to one another like the sanctity of this day of yours, in this month of yours,
in this town of yours, till the day you meet your Lord. No doubt! Haven't I conveyed Allah's message
to you? They said, "Yes." He said, "O Allah! Be witness. So it is incumbent upon those who are
present to convey it (this information) to those who are absent because the informed one might
comprehend it (what I have said) better than the present audience, who will convey it to him. Beware!
Do not renegade (as) disbelievers after me by striking the necks (cutting the throats) of one another."
Sahih al-Bukhari Book 25, Hadith 219
The Prophet (ﷺ) said, "Do you think that the tribes of Juhaina, Muzaina, Aslam and Ghifar are better than
the tribes of Bani Tamim, Bani Asad, Bani `Abdullah bin Ghatafan and Bani Amir bin Sasaa?" A man
said, "They were unsuccessful and losers." The Prophet (ﷺ) added, "(Yes), they are better than the tribes
of Bani Tamim, Bani Asad, Bani `Abdullah bin Ghatafan and Bani Amir bin Sasaa."
Sahih al-Bukhari Book 61, Hadith 25