The year 611 C.E. was a turning point in the life of Muhammad (peace be upon him) for it was in this year that he was commissioned as a prophet of God to communicate the message of Islam to mankind. It was a turning point in the life of Ali for in this year he was converted to Islam. This was a turning point in the history of Islam. In fact it was a turning point in the history of mankind. It marked the end of the age of ignorance, and the dawn of a new era of enlightenment.
"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