Know, verily, the heart wherein the least remnant of envy yet lingereth, shall never attain My everlasting dominion — Bahá’u’lláh
O Son of Earth! Know, verily, the heart wherein the least remnant of envy yet lingereth, shall never attain My everlasting dominion, nor inhale the sweet savors of holiness breathing from My kingdom of sanctity.

Bahá’u’lláh

The Hidden Words, Part Two (Persian), No. 6

Bahá’í Reference Library