54 Reflecting Jacob’s perspective at the beginning of the encounter, the narrator calls the opponent simply “a man.” Not until later in the struggle does Jacob realize his true identity.
55 The verb translated “wrestled” (וַיֵּאָבֵק, vayye’aveq) sounds in Hebrew like the names “Jacob” (יַעֲקֹב, ya’aqov) and “Jabbok” (יַבֹּק, yabboq). In this way the narrator links the setting, the main action, and the main participant together in the mind of the reader or hearer.
56 Heb “until the rising of the dawn.”

In other versions

And Jacob was left alone. And a man wrestled with him until the breaking of the day.

So Jacob was left alone, and a man wrestled with him till daybreak.

Jacob was left alone, and a man wrestled with him until daybreak.

This left Jacob all alone in the camp, and a man came and wrestled with him until the dawn began to break.

And Jacob remained alone, and a man wrestled with him until the breaking of the dawn.

And Jacob was left alone; and there wrestled a man with him until the breaking of the day.

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