'All night' in the Bible

Afterward, they carried Asahel to his father’s tomb in Bethlehem and buried him. Then Joab and his men marched all night and reached Hebron at dawn.

They had entered the house while Ish-bosheth was lying on his bed in his bedroom and stabbed and killed him. Then they beheaded him, took his head, and traveled by way of the Arabah all night.