That night, Kharis returned to the tomb alone. He violated the royal and sacred seal to regain entry.

7 seconds sound clip from the The Mummy (1959) movie soundboard.

You can hear this line at 00:40:52.920 in the Blu-ray version of the movie.

Quote context

[...]

- Hail to thee, child of the god Shu.

- The underworld has gained mastery over his diadem.

- Like the Hammamet beings, may thou arise, even as Karnak doth arise and fare forth.

- Have power over the speech of thy mouth.

- Thus started the final rites. Rites that continued for six days, culminating in the sealing of the tomb.

- That night, Kharis returned to the tomb alone. He violated the royal and sacred seal to regain entry.

- In life, the princess had been loved by Kharis. It was a forbidden love, the high priestess being bound by all vows to the god Karnak himself.

- But now Ananka was dead. And the vows were no longer binding.

- Kharis now attempted the ultimate in blasphemy.

- Using the timeless Scroll of Life said to have been written by the hand of the god Karnak himself, he tried to bring back to life the princess he loved.

[...]