Hebrews 13:5
5 Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.
Proverbs 14:30
30 A sound heart is the life of the flesh: but envy the rottenness of the bones.
1 Timothy 6:6
6 But godliness with contentment is great gain.