To him which smote great kings: for his mercy endureth for ever:

And slew famous kings: for his mercy endureth for ever:

Sihon king of the Amorites: for his mercy endureth for ever:

And Og the king of Bashan: for his mercy endureth for ever:

And gave their land for an heritage: for his mercy endureth for ever:

Even an heritage unto Israel his servant: for his mercy endureth for ever.

Who remembered us in our low estate: for his mercy endureth for ever:

 An article about the importance of remaining faithful and serving God with whole-hearted dedication to receive prosperity, using King Asa and Judah as an example. Written by Charles Spurgeon.

Perseverance in doing good

 Reflecting on Davids words in Psalm 63 about his thirst for Gods mercy and longing to see His power and glory, even in the midst of difficult circumstances.

Give thanks for God's mercy in the desert

Then we turned, and went up the way to Bashan: and Og the king of Bashan came out against us, he and all his people, to battle at Edrei.

And they turned and went up by the way of Bashan: and Og the king of Bashan went out against them, he, and all his people, to the battle at Edrei.

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Psalm 136:20 - Cross Reference