that the Messenger of Allah said: “When anyone of you has intercourse with his wife, let him cover himself and not be naked liked donkeys.” (Using translation from Ibn Mājah 1921)
"إذا أتى أحدُكم أهلَه فليستترْ، ولا يتجردا تجرُّد العَيْرين" (صغير "ولا يتجردان") .