"Chapter 23—“The Kingdom of God Is at Hand” “Jesus came into Galilee, preaching the gospel of the kingdom of God, and saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.” Mark 1:14, 15 . DA 231"
"And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel."
The EGW passage directly quotes Mark 1:15.
"The Messiah's coming had been first announced in Judea. In the temple at Jerusalem the birth of the forerunner had been foretold to Zacharias as he ministered before the altar. On the hills of Bethlehem the angels had proclaimed the birth of Jesus. To Jerusalem the magi had come in search of Him. In the temple Simeon and Anna had testified to His divinity. “Jerusalem, and all Judea” had listened to the preaching of John the Baptist; and the deputation from the Sanhedrin, with the multitude, had heard his testimony concerning Jesus. In Judea, Christ had received His first disciples. Here much of His early ministry had been spent. The flashing forth of His divinity in the cleansing of the temple, His miracles of healing, and the lessons of divine truth that fell from His lips, all proclaimed that which after the healing at Bethesda He had declared before the Sanhedrin,—His Sonship to the Eternal. DA 231.2"
"And, behold, there was a man in Jerusalem, whose name was Simeon; and the same man was just and devout, waiting for the consolation of Israel: and the Holy Ghost was upon him. And it was revealed unto him by the Holy Ghost, that he should not see death, before he had seen the Lord’s Christ. And he came by the Spirit into the temple: and when the parents brought in the child Jesus, to do for him after the custom of the law, Then took he him up in his arms, and blessed God, and said, Lord, now lettest thou thy servant depart in peace, according to thy word: For mine eyes have seen thy salvation, Which thou hast prepared before the face of all people; A light to lighten the Gentiles, and the glory of thy people Israel. And Joseph and his mother marvelled at those things which were spoken of him. And Simeon blessed them, and said unto Mary his mother, Behold, this child is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against; (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed. And there was one Anna, a prophetess, the daughter of Phanuel, of the tribe of Aser: she was of a great age, and had lived with an husband seven years from her virginity; And she was a widow of about fourscore and four years, which departed not from the temple, but served God with fastings and prayers night and day. And she coming in that instant gave thanks likewise unto the Lord, and spake of him to all them that looked for redemption in Jerusalem."
The EGW passage summarizes events described in Luke 2:25-38, specifically Simeon and Anna's recognition of Jesus in the temple. While not a direct quote, it's a clear reference to the same events and themes.