From the accounts that have come down to us, the conduct of Talha appears to be inexplicable. Uthman made some gifts to Talha and Talha supported Uthman. Later Talha joined the rioters, and opposed Uthman. Taha Hussain has expressed the view that as long as Uthman met the demands of Talha, Talha supported him but when Uthman did not or could not meet the demands of Talha, Talha joined the opposition. Talha was an eminent companion of the Holy Prophet, whom the Holy Prophet had given the tidings of paradise. He was one of the six persons whom Umar regarded as his probable successors. We cannot therefore conceive that such an eminent person could be unscrupulous enough to change sides on account of personal motives. It is also inconceivable that such eminent persons like Talha and Zubair should first offer allegiance to Ali and then repudiate it and-resort to war. It appears that all the details relevant to the matter at issue are not available with us, and in the absence of such details it is difficult for us to pass any judgement about the conduct of Talha.
"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