As far as the verse you are looking for, it's sure to be this:
Luke 6:29-30 (ESV)
To one who strikes you on the cheek, offer the other also, and from one who takes away your cloak do not withhold your tunic either. Give to everyone who begs from you, and from one who takes away your goods do not demand them back.
Remember this is advice to YOU, not to the thief. We also know from Scripture that theft is wrong and there would be nothing intrinsically wrong with the thief being brought to justice. This verse is advice to you to guard your attitude. Worldly possessions will pass away anyway, they are not worth carrying a grudge over.
As far as your situation goes, I would recommend simply remembering that God takes care of his people. Though we may be sorely tried in this life, we know that God cares for us as a Father and not a hair falls from our head but that he knows it.