Still another shadow was to gather over the last years of David. He had reached the age of threescore and ten. The hardships and exposures of his early wanderings, his many wars, the cares and afflictions of his later years, had sapped the fountain of life. Though his mind retained its clearness and strength, feebleness and age, with their desire for seclusion, prevented a quick apprehension of what was passing in the kingdom, and again rebellion sprang up in the very shadow of the throne. Again the fruit of David's parental indulgence was manifest. The one who now aspired to the throne was Adonijah, “a very goodly man” in person and bearing, but unprincipled and reckless. In his youth he had been subjected to but little restraint; for “his father had not displeased him at any time in saying, Why hast thou done so?” He now rebelled against the authority of God, who had appointed Solomon to the throne. Both by natural endowments and religious character Solomon was better qualified than …
"The days of our years are threescore years and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away."
Both passages refer to the age of seventy and the challenges that come with it. While EGW doesn't directly quote the verse, she uses the concept of old age and its limitations as a backdrop for David's later life and the rebellion of Adonijah. The connection is more than just a passing mention of age; it's used to explain David's diminished capacity.
"conspiracy was crushed. Its chief actors had incurred the penalty of death. Abiathar's life was spared, out of respect to his office and his former fidelity to David; but he was degraded from the office of high priest, which passed to the line of Zadok. Joab and Adonijah were spared for the time, but after the death of David they suffered the penalty of their crime. The execution of the sentence upon the son of David completed the fourfold judgment that testified to God's abhorrence of the father's sin. PP 749.2"
"The Lord is longsuffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty, visiting the iniquity of the fathers upon the children unto the third and fourth generation."
The EGW passage describes the consequences of sin extending to future generations, directly echoing the principle stated in Numbers 14:18 about God visiting the iniquity of the fathers upon the children.
"Howbeit, because by this deed thou hast given great occasion to the enemies of the Lord to blaspheme, the child also that is born unto thee shall surely die."
Both passages discuss the consequences of David's actions and the judgment that followed. The EGW passage describes the execution of justice after the conspiracy, linking it to the fourfold judgment mentioned in 2 Samuel 12:14, which foretold consequences for David's sin with Bathsheba. While not a direct quote, the EGW passage interprets events in light of the earlier prophecy.