Here are 4 Bible verses about loving oneself from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Proverbs 19:8 KJV
He that getteth wisdom loveth his own soul: he that keepeth understanding shall find good.
Revelation 12:11 KJV
And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
2 Timothy 3:2 KJV
For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
John 12:25 KJV
He that loveth his life shall lose it; and he that hateth his life in this world shall keep it unto life eternal.