None of the excuses were founded on a real necessity. The man who “must needs go and see” his piece of ground, had already purchased it. His haste to go and see it was due to the fact that his interest was absorbed in his purchase. The oxen, too, had been bought. The proving of them was only to satisfy the interest of the buyer. The third excuse had no more semblance of reason. The fact that the intended guest had married a wife need not have prevented his presence at the feast. His wife also would have been made welcome. But he had his own plans for enjoyment, and these seemed to him more desirable than the feast he had promised to attend. He had learned to find pleasure in other society than that of the host. He did not ask to be excused, made not even a pretense of courtesy in his refusal. The “I cannot” was only a veil for the truth—“I do not care to come.” COL 222.1 All the excuses betray a preoccupied mind. To these intended guests other interests had become all- absorbing. The i…
"And they all with one consent began to make excuse. The first said unto him, I have bought a piece of ground, and I must needs go and see it: I pray thee have me excused."
EGW is directly referencing and expanding upon the excuses given in Luke 14:18. This is a clear explicit allusion.
"By the great supper, Christ represents the blessings offered through the gospel. The provision is nothing less than Christ Himself. He is the bread that comes down from heaven; and from Him the streams of salvation flow. The Lord's messengers had proclaimed to the Jews the advent of the Saviour; they had pointed to Christ as “the Lamb of God, which taketh away the sin of the world.” John 1:29 . In the feast He had provided, God offered to them the greatest gift that Heaven can bestow—a gift that is beyond computation. The love of God had furnished the costly banquet, and had provided inexhaustible resources. “If any man eat of this bread,” Christ said, “he shall live for ever.” John 6:51 . COL 222.3"
"The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world."
EGW directly quotes John 1:29.
"I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world."
Ellen White directly references John 6:51 in this passage.
"And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst."
Both passages discuss the concept of Jesus as the 'bread of life' and the blessings offered through Him. EGW uses John 6:35 and 6:51 to support her interpretation of the great supper parable.