It's getting kind of stuffy in here. Maryyyyy... [whispers] Goodbye...
Who: Sarah Sanderson
Source: Hocus Pocus
Note: First line is spoken by Sarah, who is then ordered by Winnie to sing along with Mary before giving in and reading the magic book that can prophesy their resurrection, shortly before she is hanged along with the other two. The second line is spoken when she and the other sisters are fended off by Max and his friends successfully, and at the crack of dawn, at her whisper of "Goodbye...", she evaporates into dust along with Mary and Winnie.