Protestant
Is the Assumption of Mary biblical?
While not narrated explicitly, the Assumption is consonant with Scripture's pattern of bodily glorification (Enoch, Elijah) and Revelation's vision of the woman clothed with the sun, and rests on a unanimous ancient liturgical tradition celebrating Mary's bodily glorification.
Catholic teaching
Defined dogmatically in 1950, the Assumption teaches that Mary, preserved from sin, was taken body and soul into heavenly glory at the end of her earthly life — the fitting completion of her unique participation in her Son's victory over sin and death.
Biblical foundation
Scripture already shows bodily assumption is possible for God's faithful — Enoch 'was not, for God took him' (Gen 5:24) and Elijah was taken up in a whirlwind (2 Kings 2:11) — while Revelation 12 depicts 'a woman clothed with the sun' in heavenly glory, traditionally read as Mary, the mother of the Messiah.
Scripture references
Historical evidence
No city ever claimed to possess Mary's bodily relics, unlike the relics of virtually every other major saint, and by the fifth and sixth centuries feasts of her 'Dormition' or 'Falling Asleep' were already celebrated throughout both East and West, presupposing belief in her bodily glorification.
The Church Fathers
“It was fitting that she, who had kept her virginity intact in childbirth, should keep her own body free from all corruption even after death.”