1. A song of ascents. When the Lord will return the exiles of Zion, we will have been like dreamers.
2. Then our mouth will be filled with laughter, and our tongue with songs of joy; then will they say among the nations, "The Lord has done great things for these.”
3. The Lord has done great things for us; we were joyful.
4. Lord, return our exiles as streams to arid soil.
5. Those who sow in tears will reap with songs of joy.

Tehillim Ohel Yoseph Yitzchok (Kehot Publication Society)

Tehillim is recited by Jewish people collectively and individually, as the desire occurs to offer praise and thanksgiving to G-d; or alternitavely, in times of crisis and need, as a form of supplication, and even as a venue to express regret for sin.

6. He goes along weeping, carrying the bag of seed; he will surely return with songs of joy, carrying his sheaves.