Thereafter the Holy Prophet decided to send another emissary to the Quraish to negotiate terms of agreement with them. For such mission, a person had to be chosen who commanded influence with the Quraish. The choice fell on Uthman b Affan. Uthman b Affan accompanied by ten companions left for Makkah. Uthman went to Aban b Saeed b Aas an old friend. He welcomed Uthman, and gave him the necessary protection. Thereafter Uthman saw the principal Quraish leaders, and explained to them that the Muslims were on a mission of peace; their object was merely to perform the pilgrimage; and they wanted to extend the hand of friendship to the Quraish. The Quraish leaders said that if he wanted to perform the pilgrimage he was free to do so, but they could not allow the Muslims an entry in Makkah until an agreement was reached with them. Uthman said that he could not perform the pilgrimage unless the Holy Prophet performed the pilgrimage first. They said that they would send another emissary to the Muslim camp to arrive at some agreement with the Muslims. The Quraish took some time in nominating their emissary and during this period they detained Uthman at Makkah.
"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