Matthew 6:2-4

2Thus whenever you do charitable giving, do not blow a trumpet before you, as the hypocrites do in synagogues and on streets so that people will praise them. I tell you the truth, they have their reward.

3But when you do your giving, do not let your left hand know what your right hand is doing,

4so that your gift may be in secret. And your Father, who sees in secret, will reward you.