Then they understood that He was not telling them to beware of the leaven used in bread, but of the teaching of the Pharisees and Sadducees.
Textus Receptus (TR) - Matthew 16:12 >Τότε συνῆκαν ὅτι οὐκ εἶπε προσέχειν ἀπὸ τῆς ζύμης τοῦ ἄρτου, ἀλλ᾿ ἀπὸ τῆς διδαχῆς τῶν Φαρισαίων καὶ Σαδδουκαίων.