"This chapter is based on Mark 3:13-19 ; Luke 6:12-16 . “And He goeth up into a mountain, and calleth unto Him whom He would: and they came unto Him. And He ordained twelve, that they should be with Him, and that He might send them forth to preach.” DA 290"
"And he goeth up into a mountain, and calleth unto him whom he would: and they came unto him."
EGW explicitly states that the chapter is based on Mark 3:13-19 and quotes Mark 3:13 directly.
"And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God."
EGW explicitly states that the chapter is based on Luke 6:12-16. While she doesn't directly quote Luke 6:12 in the provided excerpt, the reference is valid as the surrounding context in DA 290 discusses the events described in Luke 6:12-16.
"And he goeth up into a mountain, and calleth unto him whom he would: and they came unto him. And he ordained twelve, that they should be with him, and that he might send them forth to preach, And to have power to heal sicknesses, and to cast out devils: And Simon he surnamed Peter; And James the son of Zebedee, and John the brother of James; and he surnamed them Boanerges, which is, The sons of thunder: And Andrew, and Philip, and Bartholomew, and Matthew, and Thomas, and James the son of Alpheus, and Thaddeus, and Simon the Canaanite, And Judas Iscariot, which also betrayed him: and they went into an house."
Ellen White directly references Mark 3:13-19 in this passage.
"And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God. And when it was day, he called unto him his disciples: and of them he chose twelve, whom also he named apostles; Simon, (whom he also named Peter,) and Andrew his brother, James and John, Philip and Bartholomew, Matthew and Thomas, James the son of Alpheus, and Simon called Zelotes, And Judas the brother of James, and Judas Iscariot, which also was the traitor."
Ellen White directly references Luke 6:12-16 in this passage.
"It was beneath the sheltering trees of the mountainside, but a little distance from the Sea of Galilee, that the twelve were called to the apostolate, and the Sermon on the Mount was given. The fields and hills were the favorite resorts of Jesus, and much of His teaching was given under the open sky, rather than in the temple or the synagogues. No synagogue could have received the throngs that followed Him; but not for this reason only did He choose to teach in the fields and groves. Jesus loved the scenes of nature. To Him each quiet retreat was a sacred temple. DA 290.2"
"And seeing the multitudes, he went up into a mountain: and when he was set, his disciples came unto him:"
Both passages describe Jesus teaching on a mountainside. EGW elaborates on the setting and Jesus' preference for teaching in nature, drawing a thematic parallel between the Sermon on the Mount and Jesus' connection with the natural world.
"It was under the trees of Eden that the first dwellers on earth had chosen their sanctuary. There Christ had communed with the father of mankind. When banished from Paradise, our first parents still worshiped in the fields and groves, and there Christ met them with the gospel of His grace. It was Christ who spoke with Abraham under the oaks at Mamre; with Isaac as he went out to pray in the fields at the eventide; with Jacob on the hillside at Bethel; with Moses among the mountains of Midian; and with the boy David as he watched his flocks. It was at Christ's direction that for fifteen centuries the Hebrew people had left their homes for one week every year, and had dwelt in booths formed from the green branches “of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook.” Leviticus 23:40 . DA 290.3"
"And ye shall take you on the first day the boughs of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook; and ye shall rejoice before the Lord your God seven days."
Ellen White directly references Leviticus 23:40 in this passage.
"And they heard the voice of the Lord God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the Lord God amongst the trees of the garden."
Both passages refer to the presence of God/Christ in a garden setting with trees. EGW uses Genesis 3:8 as a starting point to develop a broader theme of God's communion with humanity in natural settings throughout biblical history.