'Throng' in the Bible

I will give You thanks in the great congregation;I will praise You among a mighty people.

These things I [vividly] remember as I pour out my soul;How I used to go along before the great crowd of people and lead them in procession to the house of God [like a choirmaster before his singers, timing the steps to the music and the chant of the song],With the voice of joy and thanksgiving, a great crowd keeping a festival.