Our Lord had said above, Because of the people that stand by I said it, that they may believe that Thou hast sent Me. It would have been ignorance of the future, if He had said this, and none believed, after all. Therefore it follows: Then many of the Jews which came to Mary, and had seen the things which Jesus did, believed on Him. But some of them went their way to the Pharisees, and told them what things Jesus had done. It is doubtful from these words, whether those who went to the Pharisees, were of those many who believed, and meant to conciliate the opponents of Christ; or whether they were of the unbelieving party, and wished to inflame the envy of the Pharisees against Him. The latter seems to me the true supposition; especially as the Evangelist describes those who believed as the larger party. Many believed; whereas it is only a few who go to the Pharisees: Some of them went to the Pharisees, and told them what things Jesus had done.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: t. xxviii. 10.