He hath now actually given that mercy which he had promised to the Israelites. All the ends of the earth; all the inhabitants of the earth, from one end to another. Have seen, i.e. enjoyed it, as this word is oft used, as hath been proved again and again.
Related Commentaries of Psalms 98:3
Psalms 98:3
3 He hath remembered his mercy and his truth toward the house of Israel: all the ends of the earth have seen the salvation of our God.