In the Holy Qur'an

But as for him who is awed to stand before his Lord and forbids the soul from (following) desires, his refuge will indeed be paradise (79:40-41)

In the Traditions

The Prophet said, “The most courageous of people is he who overcomes his desires.”

The Prophet said, “A strong person is not one who overcomes people, but a strong person is one who overcomes his own self.”

Imam Ali said, “Prohibiting one’s self from desire is the greater Jihad.”

Prophet Solomon said, “Someone who prevails over his desires is stronger than he who captures a city by himself.”