After the marriage ceremony is performed, the one that walks first from the altar is the one who will die first, either bride or groom.
Alabama.

After the marriage ceremony is performed, the one that walks first from the altar is the one who will die first, either bride or groom.
Source: Current Superstitions (1896), entry 359.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.