There came men — Who possibly had not heard of the temple being burnt. Cut themselves — With all indications of mourning used in those countries.
Related Commentaries of Jeremiah 41:5
Jeremiah 41:5
5 That there came certain from Shechem, from Shiloh, and from Samaria, even fourscore men, having their beards shaven, and their clothes rent, and having cut themselves, with offerings and incense in their hand, to bring them to the house of the LORD.