Psalms 89:15

“Blessed is the people that know the joyful sound, etc.] Of the love, grace, and mercy of God displayed in Christ, of peace and pardon by his blood, of justification by his righteousness, of atonement by his sacrifice, and of complete salvation by his obedience, sufferings, and death; this is the sound of the Gospel, and a joyful one it is to sensible sinners; and is so called in allusion either to a shout made upon a victory gained, and such a sound is the Gospel; it declares victory by Christ over sin, Satan, the world, and death, and every enemy; and that he has made his people more than conquerors over them; or to the jubilee trumpet, which proclaimed liberty and a restoration of…”

“Blessed is the people - Happy is their condition. See the notes at Psalms 1:1. That know the joyful sound - That hear that sound. DeWette explains this of the call to the festivals and offerings, Leviticus 23:24; Numbers 10:10; Psalms 27:6. That is, says he, those who honor and worship God. The Hebrew word - תרועה terû‛âh - means a loud noise; a tumult; especially, shouts of joy, or rejoicing, Job 8:21; 1 Samuel 4:5; the “shout of a king,” that is, the joyful acclamations with which a king is welcomed, Numbers 23:21; the shout of battle, Jeremiah 4:19; Jeremiah 49:2. Then it means the sound or clangor of trumpets, Leviticus 25:9; Numbers 29:1-6. The word is, therefore, especially…”

“Know - Who enjoy the presence of God and his ordinances, to which they are called by the sound of trumpets. Walk - Under the comfortable influences of thy favour. Psalms 89:16”

“89:15-16 Those who are wise worship God, walk in his light, rejoice in their relationship with him, and exult in his character.”

“know: Psa 90:6, Psa 98:4-6, Psa 100:1; Lev 25:9; Num 10:10, Num 23:21; Isa 52:7, Isa 52:8; Nah 1:15; Luk 2:10-14; Rom 10:15, Rom 10:18 in the light: Psa 4:6, Psa 44:3; Num 6:26; Job 29:3; Pro 16:15; Isa 2:5; Joh 14:21-23; Act 2:28; Rev 21:23 Psalms 89:16”

“The poet has now described what kind of God He is upon whose promise the royal house in Israel depends. Blessed, then, is the people that walks in the light of His countenance. הלּך of a self-assured, stately walk. The words ידעי תּרוּעה are the statement of the ground of the blessing interwoven into the blessing itself: such a people has abundant cause and matter for exultation (cf. Psa 84:5). תּרוּעה is the festive sound of joy of the mouth ( Num 23:21), and of trumpets or sackbuts ( Psa 27:6). This confirmation of the blessing is expanded in Psa 89:17-19. Jahve's שׁם, i.e., revelation or manifestation, becomes to them a ground and object of unceasing joy; by His צדקה, i.e., the rigour…”