He did not want the people to follow in his retinue
One day Ali was riding a horse. Some people followed him and began to walk in his train. He asked them why they were following him. They said that they felt elated to walk in his retinue. He said: "Go back to your business. By walking behind me you will breed feelings of inferiority in yourselves, and infect me with arrogance."
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"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