Most Relevant Verses
Take care not to do your good deeds publicly or before men, in order to be seen by them; otherwise you will have no reward [ reserved for and awaiting you] with and from your Father Who is in heaven.
Thus, whenever you give to the poor, do not blow a trumpet before you, as the hypocrites in the synagogues and in the streets like to do, that they may be recognized and honored and praised by men. Truly I tell you, they have their reward in full already.
Also when you pray, you must not be like the hypocrites, for they love to pray standing in the synagogues and on the corners of the streets, that they may be seen by people. Truly I tell you, they have their reward in full already.
And whenever you are fasting, do not look gloomy and sour and dreary like the hypocrites, for they put on a dismal countenance, that their fasting may be apparent to and seen by men. Truly I say to you, they have their reward in full already.