Chronicles II 20:3

3 And Josaphat was alarmed, and set his face to seek the Lord earnestly, and he proclaimed a fast in all Juda.

Chronicles II 20:3 Meaning and Commentary

2 Chronicles 20:3

And Jehoshaphat feared
Exceedingly, as the Targum adds, not merely because of the number of his enemies, for he had forces enough to go forth against them, see ( 2 Chronicles 17:14-19 ) , but chiefly because the Lord had told him that wrath was upon him from him, ( 2 Chronicles 19:2 ) and he might fear that this was the time for the execution of it: and set himself to seek the Lord;
by prayer and supplication, with all seriousness, fervour, and constancy: and proclaimed a fast throughout all Judah;
a day of humiliation and mourning for sin before the Lord; when they were ordered to abstain from bodily food and labour, that they might be fit and more at leisure for spiritual exercises.

Chronicles II 20:3 In-Context

1 And after this came the children of Moab, and the children of Ammon, and with them of the Minaeans, against Josaphat to battle.
2 And they came and told Josaphat, saying, There is come against thee a great multitude from Syria, from beyond the sea; and, behold, they are in Asasan Thamar, this is Engadi.
3 And Josaphat was alarmed, and set his face to seek the Lord earnestly, and he proclaimed a fast in all Juda.
4 And Juda gathered themselves together to seek after the Lord: even from all the cities of Juda they came to seek the Lord.
5 And Josaphat stood up in the assembly of Juda in Jerusalem, in the house of the Lord, in front of the new court.

The Brenton translation of the Septuagint is in the public domain.