On the fourth day, &c. Undoubtedly many thanksgivings were offered to God immediately, and perhaps even a day of praise was kept in the camp, before they drew their forces out of the field: but in the fourth day they assembled in a valley, and blessed God with so much zeal and fervency, that a name was thereby given to the place, and the remembrance of that work of wonder perpetuated for the encouragement of succeeding generations to trust in God. Of Berachah Hebrew, of blessing, so called, from the solemn blessings and praises given to God on that occasion.
Related Commentaries of 2 Chronicles 20:26
2 Chronicles 20:26
26 And on the fourth day they assembled themselves in the valley of Berachah;e for there they blessed the LORD: therefore the name of the same place was called, The valley of Berachah, unto this day.