How do we know from the Bible that Adam and Eve have been saved from the lake of fire?

How do we know from the Bible that Adam and Eve have been saved from the lake of fire? According to my knowledge, it is a fairly unanimous position among the Oriental Christianity, the Roman Catholic Church, the Orthodox Church, and the mainstream Protestantism (I mean those protestants those who directly address Jesus by His name in their prayers) that Adam and Eve are saved and therefore will not go to the lake of fire in future eternity. Usually, this verse is cited: > "And I will put enmity between thee and the woman, and between thy > seed and her seed; it shall bruise thy head, and thou shalt bruise his > heel." (Genesis 3:15, KJV) However, the language here is rather metaphorical, and to me it looks like an overreach to claim that this verse definitively states that Adam and Eve are saved. So, has there been any attempt within Christianity—I am sure there has—to provide a logical and exhaustive proof from other parts of Scripture, both the Old Testament and the New Testament, that Adam and Eve are saved from the lake of fire?