Rashi on Genesis 24:65/רש"י על בראשית כ״ד:ס״ה

1ותתכס AND [SHE] COVERED HERSELF — This has a passive meaning (she was covered); it is like (35:8) ותקבר “and she was buried”, and (1 Samuel 4:18) ותשבר “and [his neck] was broken”.