According to Tabari, the last sermon of Uthman was as follows:
"The truth of the matter is that you are in this world merely to prepare for the next world. God never intended that you should be attracted by the world. This world will not last; the hereafter alone will be eternal. Therefore you should not be proud of anything in this world. Beware that you do not become forgetful of the next world. Prefer the hereafter to this world, for you have to ultimately return to God. Always fear God. This fear will serve you as a shield against His punishment. Be afraid of the punishment of God. Remain united, and be not divided into sections. Remember that you were the enemies of one another, and under Islam, God made you like brothers. See that this unity is maintained at all costs."
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari