Here the word "we" refers to James and the elders ([Acts 21:18](../21/18.md)). Here "you" refers to Paul. (See: [[rc://en/ta/man/translate/figs-exclusive]] and [[rc://en/ta/man/translate/figs-you]])
"four men who made a promise to God." This was the kind of vow where a person would not drink alcohol or cut his hair until the end of a set period of time.