Matthew 6:2-4 NIV

2 "So when you give to the needy, do not announce it with trumpets, as the hypocrites do in the synagogues and on the streets, to be honored by men. I tell you the truth, they have received their reward in full.
3 But when you give to the needy, do not let your left hand know what your right hand is doing,
4 so that your giving may be in secret. Then your Father, who sees what is done in secret, will reward you.1

References for Matthew 6:4