When they came to the threshing place at Atad east of the Jordan, they mourned loudly for a long time, and Joseph performed mourning ceremonies for seven days.
David said to the messenger, “Encourage Joab and tell him not to be upset, since you never can tell who will die in battle. Tell him to launch a stronger attack on the city and capture it.”
so he sent for a clever woman who lived in Tekoa. When she arrived, he said to her, “Pretend that you are in mourning; put on your mourning clothes, and don't comb your hair. Act like a woman who has been in mourning for a long time.
Then David ordered Joab and his men to tear their clothes, wear sackcloth, and mourn for Abner. And at the funeral King David himself walked behind the coffin.