Mourning: Wearing Mourning Clothes
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Genesis 38:14
she removed her widow’s garments, covered her face with a veil to disguise herself, and sat at the entrance to Enaim, which is on the way to Timnah. For she saw that although Shelah had grown up, she had not been given to him as a wife.
2 Samuel 14:2
So Joab sent to Tekoa to bring a wise woman from there. He told her, “Please pretend to be a mourner; put on clothes for mourning and do not anoint yourself with oil. Act like a woman who has mourned for the dead a long time.