Hadith 692
'Adi bin Hatim (May Allah be pleased with him) reported:
عن عدي بن حاتم رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم "اتقوا النار ولو بشق تمرة فمن لم يجد فبكلمة طيبة" ((متفق عليه)) .
Messenger of Allah (ﷺ) said, "Guard yourselves against the Fire (of Hell) even if it be only with half a date-fruit (given in charity); and if you cannot afford even that, you should at least say a good word." [Al-Bukhari and Muslim].
In plain words
Shield yourself from the Fire even with half a date given in charity, and if you cannot manage even that, then with a kind word. No one is too poor to do some good.
Reference : Riyad as-Salihin 692 In-book reference : Book 1, Hadith 13