Mattityahu 6:1-4, 19

Be careful that you don't practice your tzedakah (charity giving) before Bnei Adam in order to varf (show off, flaunt) to be seen by Bnei Adam; for then you have no sachar (reward) with your Av shbaShomayim. Therefore, whenever you contribute tzedakah, don't blow the shofar before you, as the tzevuim (hypocrites) do in the shuls and in the streets, in order that they may receive kavod (glory) from Bnei Adam. Omein, truly I say to you, they have their sachar (reward). But when you contribute tzedakah, do not let your left hand have da'as (knowledge) of what your right hand is doing, so that your tzedakah may be nistar (hidden, in secret), and your Av HaRoeh b'seter (Father, the One seeing in secret) sachar (reward) will give you.

Do not store up for yourselves otzarot (treasures) on haaretz, where moth and rust destroy and where ganavim (thieves) break in and steal.