The Prophet ﷺ said, "Guard yourselves against the Fire," then he turned away and grimaced. He said again, "Guard yourselves against the Fire," then turned away and grimaced. He did this three times, until we thought he was actually looking at it. Then he said, "Guard yourselves against the Fire, even with half a date, and whoever cannot find that, then with a kind word."
قال الأعمش حدثني عمرو عن خيثمة
قال النبي ﷺ اتقوا النار ثم أعرض وأشاح ثم قال اتقوا النار ثم أعرض وأشاح ثلاثا حتى ظننا أنه ينظر إليها ثم قال اتقوا النار ولو بشق تمرة فمن لم يجد فبكلمة طيبة