When I remember these [things]
 Either the reproaches of his enemies; or rather his past enjoyments of God in his house, he after makes mention of; 
 I pour out my soul in me,
 that is, he had no life nor spirit in him, but was quite overwhelmed with distress and anguish; or he poured out his soul in prayer to God, that it might be with him as in times past; 
 for I had gone with the multitude, I went with them to the house of
 God;
 the place of public worship, whither he had often gone, with great pleasure and delight; and, which added thereto, there were many that went along with him; or whom he had "caused to go" F7, had brought along with him; which is the sense of the word, only used here and in ( Isaiah 38:15 ) ; as Dr. Hammond from R. Tanchum and Aben Walid, has shown: a good man will not only attend divine worship himself, but will bring others with him: but now, he could neither go alone, nor in company, the remembrance of which greatly affected his mind; see ( Psalms 137:1 ) ; 
 with the voice of joy and praise:
 the people singing psalms, hymns, and spiritual songs; 
 with a multitude that kept holy day;
 as especially on the three great festivals in the year, the feasts of passover, pentecost, and tabernacles, when all the males of Israel appeared before God together, and which was a large multitude; and a delightful sight it was to behold them, when they were all engaged in religious worship at once.