This Psalm seems to have been written by David for the use of the people when they came up to Jerusalem to the solemn feasts.
David professeth his joy when he went into the house of the Lord, Psa_122:1-5; prayeth for the welfare, prosperity, and peace of it, Psa_122:6-9.
Let us go; exhorting one another to it, as Deu_33:19. Or, We will go. The sense is, It delighteth me much to hear that the people, who had so long lived in the neglect or contempt of God’s worship, were now ready and forward in it.