It was narrated that Ibn 'Abbas said: The Messenger of Allah (ﷺ) said in his Farewell Sermon:

"O people, what day is this?" They said: This is a sacred day. He said: “What land is this?" They said: This is a sacred land. He said: "What month is this?" They said: This is a sacred month. He said: “Your wealth, your blood and your honour are sacred to you, as sacred as this day of yours, in this land of yours and in this month of yours.” Then he repeated it several times, then he looked up to the heavens and said: "O Lord, have I conveyed (the message)?” several times. And Ibn 'Abbas said: By Allah, this is advice for the sake of Allah. Then he said: "Let those who are present convey it to those who are absent. Do not go back to being disbelievers after I am gone, striking one another's necks."