This hadeeth comes under the following chapter: EXHORTATION TO SADAQA EVEN THOUGH IT IS HALF A DATE, OR A GOOD WORD, FOR THEY ARE PROTECTION AGAINST FIRE
'Adi b. Hatim reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) made a mention of Fire. He turned his face aside and diverted his attention and then said: Guard (yourselves) against Fire. He turned his face and diverted his attention till we thought as if he were (actually seeing it and then said: Protect yourselves against Fire even if it is with half a date, and he who does not find it, (he should do so) with pleasant words. Abu Kuraib did not mention the word: (as if).