"“Deal courageously, and the Lord shall be with the good.” Verses 9-11 . PK 198.1"
"Be strong and of a good courage, fear not, nor be afraid of them: for the Lord thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee."
Both passages encourage courage and assure divine support. Deuteronomy 31:6 is a general encouragement to be strong and courageous because God is with them, while the EGW passage quotes Jehoshaphat encouraging the judges to 'deal courageously' with the assurance that 'the Lord shall be with the good.'
"In his careful safeguarding of the rights and liberties of his subjects, Jehoshaphat emphasized the consideration that every member of the human family receives from the God of justice, who rules over all. “God standeth in the congregation of the mighty; He judgeth among the gods.” And those who are appointed to act as judges under Him, are to “defend the poor and fatherless;” they are to “do justice to the afflicted and needy,” and “rid them out of the hand of the wicked.” Psalm 82:1, 3, 4 . PK 198.2"
"Defend the poor and fatherless: do justice to the afflicted and needy."
EGW directly quotes Psalm 82:1, 3, and 4 in the passage.
"Toward the close of Jehoshaphat's reign the kingdom of Judah was invaded by an army before whose approach the inhabitants of the land had reason to tremble. “The children of Moab, and the children of Ammon, and with them other beside the Ammonites, came against Jehoshaphat to battle.” Tidings of this invasion reached the king through a messenger, who appeared with the startling word, “There cometh a great multitude against thee from beyond the sea on this side Syria: and, behold, they be in Hazazon-tamar, which is Engedi.” 2 Chronicles 20:1, 2 . PK 198.3"
"It came to pass after this also, that the children of Moab, and the children of Ammon, and with them other beside the Ammonites, came against Jehoshaphat to battle."
The EGW passage directly quotes 2 Chronicles 20:1, making it a clear and explicit allusion.
"Then there came some that told Jehoshaphat, saying, There cometh a great multitude against thee from beyond the sea on this side Syria; and, behold, they be in Hazazon–tamar, which is En–gedi."
The EGW passage directly quotes 2 Chronicles 20:2, making it a clear and explicit allusion.