Genesis 24:17, 44 - A stranger in need is a friend indeed.

And the servant ran to meet her, and said, Let me, I pray thee, drink a little water of thy pitcher... And she say to me, Both drink thou, and I will also draw for thy camels: let the same be the woman whom the LORD hath appointed out for my master's son.

Remember to show hospitality to strangers, for by this some have entertained angels without knowing (Hebrews 13:2). In a similar situation, the stranger requesting the drink was Jesus Christ (John 4:7).