A private vow for thanksgiving performed in any place by the Jews, with the shearing of the hair. It differed from the Nazarite vow, which had to be carried out in Jerusalem with the shaving of the head (Acts 21:24 and note 3; Num. 6:1-5, 18; cf. 1 Cor. 11:6, where it is shown that there is a difference between shearing and shaving). Paul was a Jew and kept the vow, but he would not and did not impose it on the Gentiles. According to the principle of his teaching concerning God's New Testament economy, Paul should have given up all the Jewish practices, which belonged to the Old Testament dispensation. However, he still had this vow, and it seems that God tolerated it, probably because it was a vow carried out in private outside Jerusalem and would not have had much effect on the believers.