Virtue and context
Al-Harith ibn Muslim reported from his father, Muslim ibn al-Harith al-Tamimi (raḍiy Allāhu ʿanhu), that the Messenger of Allah ﷺ privately instructed him to ask Allah for protection from the Fire seven times after finishing Maghrib. If he then died during that night, protection from the Fire would be recorded for him. He ﷺ told him to say the same after Fajr; if he died that day, the same protection would be recorded.
Abu Saʿid transmitted al-Harith’s explanation that the Messenger of Allah ﷺ had shared this privately with them, so they reserved the teaching for their brethren.