In spite of the accession of the tribes of Banu Tai and Banu Asad, the forces at the disposal of Ali were still too inadequate for any big show down. The crisis had deepened after the occupation of Basra by Ayesha and the confederates. To dislodge the rebels from Basra, a large army was needed, and such large force could come from Kufa alone. Ali accordingly decided to win over Kufa to his cause before proceeding to Basra.
"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