Matthew 6:5

Καὶ ὅταν προσεύχῃ, οὐκ ἔσῃ ὥσπερ οἱ ὑποκριταί· ὅτι φιλοῦσιν ἐν ταῖς συναγωγαῖς καὶ ἐν ταῖς γωνίαις τῶν πλατειῶν ἑστῶτες προσεύχεσθαι, ὅπως ἂν φανῶσι τοῖς ἀνθρώποις· ἀμὴν λέγω ὑμῖν ὅτι ἀπέχουσι τὸν μισθὸν αὐτῶν.

And when you pray, do not be like the hypocrites, for they love to pray standing in the synagogues and in the corners of the streets so that they may be seen by men. Amen I say to you, they have received their reward.