"Not at first had God revealed the exact time of the first advent; and even when the prophecy of Daniel made this known, not all rightly interpreted the message. PK 700.1"
"Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy. Know therefore and understand, that from the going forth of the commandment to restore and to build Jerusalem unto the Messiah the Prince shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall, even in troublous times. And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined. And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate."
The EGW passage explicitly refers to Daniel's prophecy and its interpretation regarding the timing of the Messiah's first advent, directly alluding to Daniel 9:24-27.
"Century after century passed away; finally the voices of the prophets ceased. The hand of the oppressor was heavy upon Israel. As the Jews departed from God, faith grew dim, and hope well-nigh ceased to illuminate the future. The words of the prophets were uncomprehended by many; and those whose faith should have continued strong were ready to exclaim, “The days are prolonged, and every vision faileth.” Ezekiel 12:22 . But in heaven's council the hour for the coming of Christ had been determined; and “when the fullness of the time was come, God sent forth His Son, ... to redeem them that were under the law, that we might receive the adoption of sons.” Galatians 4:4, 5 . PK 700.2"
"Son of man, what is that proverb that ye have in the land of Israel, saying, The days are prolonged, and every vision faileth?"
Ellen White directly references Ezekiel 12:22 in this passage.
"Lessons must be given to humanity in the language of humanity. The Messenger of the covenant must speak. His voice must be heard in His own temple. He, the author of truth, must separate truth from the chaff of man's utterance, which had made it of no effect. The principles of God's government and the plan of redemption must be clearly defined. The lessons of the Old Testament must be fully set before men. PK 700.3"
"Behold, I will send my messenger, and he shall prepare the way before me: and the Lord, whom ye seek, shall suddenly come to his temple, even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the Lord of hosts."
EGW explicitly refers to the 'Messenger of the covenant' coming to 'His own temple,' which is a direct allusion to Malachi 3:1. The context of separating truth from chaff also aligns with the idea of purification and judgment present in Malachi.