You have no certain rule for your worship, but only do things which your fathers did, without any revelation of the Divine will, by which you may be assured that what you do is acceptable to God. We know that God hath revealed his will, that his people should worship him at Jerusalem by such rites and performances as he himself hath instituted in his word, so as we are certain that what we do is acceptable to God: for unto the Jews (of old) were committed the oracles of God, the ordinary means of salvation; Out of Zion went forth the law, and the word of the Lord from Jerusalem, Isaiah 2:3.
Related Commentaries of John 4:22
John 4:22
22 Ye worship ye know not what: we know what we worship: for salvation is of the Jews.