Al-Isra 17:28

Wa-imma tuAAridanna AAanhumuibtighaa rahmatin min rabbika tarjooha faqullahum qawlan maysoora

And if you [must] turn away from them [i.e., the needy] awaiting mercy from your Lord which you expect, then speak to them a gentle word.

And if you turn away from them looking for a bounty from your Lord you are expecting, then speak to them in polite words.