Leviticus 18:5

He shall live in them — Not only happily here, but eternally hereafter. This is added as a powerful argument why they should follow God's commands, rather than mens examples, because their life and happiness depend upon it. And though in strictness, and according to the covenant of works they could not challenge life for so doing, except their obedience was universal, perfect, constant and perpetual, and therefore no man since the fall could be justified by the law, yet by the covenant of grace this life is promised to all that obey God's commands sincerely.