3:9 change . . . a pure speech. To purify the lips is either to cleanse from sin in general (Is. 6:5) or to remove the names of foreign gods from the lips of a worshiper (Hos. 2:17).

of the peoples. The Gentiles will also call on His name (Is. 52:15; 65:1; 66:18).

all of them may call upon the name of the Lord. In contrast with the idolaters of 1:5, 6. See Gen. 4:26; 1 Kin. 18:24; Jer. 10:25; Joel 2:32; Acts 2:21; Rom. 10:12, 13.