I was once asked to transcribe this song for a church in south Texas. It's a simple acoustic song with a singable melody. Lyrics are arguably a rendition of Psalm 136. Below:
Give thanks to the Lord, for He is good
Give thanks to the Lord, for He is good
His mercy endures, His love endures forever
Let Thou redeemed of the Lord tell their story
Those He redeemed from the Hands of the enemy
Give thanks to the Lord, for He is good
Give thanks to the Lord, for He is good
His mercy endures, His love endures forever
Let us give thanks to the Lord for His unfailing love
Let us raise up our voice with songs of joy
Give thanks to the Lord, for He is good
Give thanks to the Lord, for He is good
His mercy endures, His love endures
His mercy endures, His love endures
His mercy endures, His love endures forever