What was Imhotep condemned to in the film "The Mummy"?

In The Mummy, Imhotep was condemned to endure the Hom Dai.

The film presents the Hom Dai as the most severe of ancient Egyptian curses. After Imhotep and Anck-su-namun murder Pharaoh Seti I and attempt to resurrect her, Imhotep is captured at Hamunaptra. His priests are sentenced to be mummified alive, while Imhotep receives the Hom Dai as punishment for sacrilege and murder.

The curse involves removing his tongue, mummifying him alive, and sealing him inside a sarcophagus with flesh-eating scarabs. Unlike an ordinary execution, the Hom Dai leaves its victim in a supernatural state of suspended, agonizing existence. The priests also bury the Book of the Dead with him, which later becomes central to his resurrection.

A common mix-up is calling the punishment simply “mummification.” That describes part of the ritual, but the film specifically names Imhotep’s sentence the Hom Dai. The 1999 film uses fictional mythology rather than a documented ancient Egyptian legal practice.