Русско-английский словарь пословиц и поговорок
В ЗАВИСТИ НЕТ НИ ПРОКУ, НИ РАДОСТИ
There is no point envying anybody because you gain neither satisfaction nor profit by it. See Железо ржа съедает, а завистливый от зависти сохнет (Ж)
Cf:The envious man grows lean (shall never want woe) (Br.). Envy never enriched any man (Am.)