"All earthly powers are under the control of the Infinite One. To the mightiest ruler, to the most cruel oppressor, He says, “Hitherto shalt thou come, but no further.” Job 38:11 . God's power is constantly exercised to counteract the agencies of evil; He is ever at work among men, not for their destruction, but for their correction and preservation. PP 694.1"
"And said, Hitherto shalt thou come, but no further: and here shall thy proud waves be stayed?"
Ellen White directly references Job 38:11 in this passage.
"With great rejoicing the victors took up their homeward march. Upon reaching their companions who had remained behind, the more selfish and unruly of the four hundred urged that those who had had no part in the battle should not share the spoils; that it was enough for them to recover each his wife and children. But David would permit no such arrangement. “Ye shall not do so, my brethren,” he said, “with that which the Lord hath given us.... As his part is that goeth down to the battle, so shall his part be that tarrieth by the stuff; they shall part alike.” Thus the matter was settled, and it afterward became a statute in Israel that all who were honorably connected with a military campaign should share the spoils equally with those who engaged in actual combat. PP 694.2"
"Then said David, Ye shall not do so, my brethren, with that which the Lord hath given us, who hath preserved us, and delivered the company that came against us into our hand."
EGW directly quotes 1 Samuel 30:23.
"Besides recovering all the spoil that had been taken from Ziklag, David and his band had captured extensive flocks and herds belonging to the Amalekites. These were called “David's spoil;” and upon returning to Ziklag, he sent from this spoil presents to the elders of his own tribe of Judah. In this distribution all those were remembered who had befriended him and his followers in the mountain fastnesses, when he had been forced to flee from place to place for his life. Their kindness and sympathy, so precious to the hunted fugitive, were thus gratefully acknowledged. PP 694.3"
"And when David came to Ziklag, he sent of the spoil unto the elders of Judah, even to his friends, saying, Behold a present for you of the spoil of the enemies of the Lord;"
Both passages describe David sending spoil to the elders of Judah after the battle with the Amalekites. EGW provides additional details and interpretation.
It was the third day since David and his warriors returned to Ziklag. As they labored to restore their ruined homes, they watched with anxious hearts for tidings of the battle which they knew must have been fought between Israel and the Philistines. Suddenly a messenger entered the town, “with his clothes rent, and earth upon his head.” He was at once brought to David, before whom he bowed with reverence, expressing recognition of him as a powerful prince, whose favor he desired. David eagerly inquired how the battle had gone. The fugitive reported Saul's defeat and death, and the death of Jonathan. But he went beyond a simple statement of facts. Evidently supposing that David must cherish enmity toward his relentless persecutor, the stranger hoped to secure honor to himself as the slayer of the king. With an air of boasting the man went on to relate that during the battle he found the monarch of Israel wounded, and sore pressed by his foes, and that at his own request the messenger ha…
"It came even to pass on the third day, that, behold, a man came out of the camp from Saul with his clothes rent, and earth upon his head: and so it was, when he came to David, that he fell to the earth, and did obeisance."
EGW directly references and expands upon the biblical account of the messenger arriving with torn clothes and earth on his head.