On the death of the Holy Prophet, politics erupted among the Muslims with the demand of the Ansar for the election of the Caliph form among them. The viewpoint of the Quraish was that the Caliph should be chosen from among the Quraish, the tribe to which the Holy Prophet belonged. Wiser counsels prevailed, and the Ansar agreed to the election of the Caliph from among the Quraish. Abu Bakr was accordingly elected as the Caliph and the Ansars offered their allegiance to him. Soon after the election of Abu Bakr, politics took the form of the demand for the non-payment of Zakat by the tribes. Abu Bakr did not accept the demand, and all opposition was suppressed as a result of the apostasy campaigns.
"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