Many languages distinguish between inclusive and exclusive first-person plural pronouns (“we”). (Click or tap here to see more details)
The inclusive “we” specifically includes the addressee (“you and I and possibly others”), while the exclusive “we” specifically excludes the addressee (“he/she/they and I, but not you”). This grammatical distinction is called “clusivity.” While Semitic languages such as Hebrew or most Indo-European languages such as Greek or English do not make that distinction, translators of languages with that distinction have to make a choice every time they encounter “we” or a form thereof (in English: “we,” “our,” or “us”).
For this verse, translators typically select the exclusive form (excluding Jesus). (Source: Velma Pickett and Florence Cowan in Notes on Translation January 1962, p. 1ff.)
In Huautla Mazatec, however, the translators selected the inclusive we (including the Pharisees talking to each other). SIL International Translation Department (1999) notes that as a possibility.