shim.mur denotes the night of watchful observance associated with the LORD's bringing Israel out of Egypt.

The attested use names a night marked by watching in connection with the LORD's bringing Israel out of Egypt, and with continued observance by Israel.

1. A night of watchful observance · dominant

   In Exodus 12:42, the masculine plural form occurs twice in statements about the night when the LORD brought them out of Egypt and the same night for Israel throughout their generations. The APB renders the verse as “a night of watching for the LORD.”

   Exodus 12:42

In the Anselm Project Bible: In Exodus 12:42, the APB presents both occurrences within the repeated phrase “a night of watching for the LORD.” This identifies the verse's presentation rather than a precise token-by-token rendering.