standing vigil

Standing vigil is keeping watch over someone or something, typically during a solemn or critical period.

The phrase often describes remaining at the bedside of someone dying or gravely ill: She spent the night standing vigil at her mother's hospital bed.

It extends to ceremonial watching—mourners standing vigil at a wake, protesters maintaining an overnight presence, or guards posted at a memorial.

The act implies patient, respectful attentiveness through difficult hours.