The Messenger of Allah ﷺ said, "Guard yourselves against the Fire, even with half a date."
حدثنا وكيع قال حدثنا محمد بن سليم عن ابن أبي مليكة
قال رسول الله ﷺ اتقوا النار ولو بشق تمرة
Its isnad is sahih. Muhammad bin Sulaym is Abu Hilal Rasibi, and the hadith was mentioned previously at 24382.