"and sick at heart, they remembered His words, “If they do these things in a green tree, what shall be done in the dry?” Luke 23:31 . AA 25.1"
"For if they do these things in a green tree, what shall be done in the dry?"
Ellen White directly references Luke 23:31 in this passage.
"Jesus had several times attempted to open the future to His disciples, but they had not cared to think about what He said. Because of this His death had come to them as a surprise; and afterward, as they reviewed the past and saw the result of their unbelief, they were filled with sorrow. When Christ was crucified, they did not believe that He would rise. He had stated plainly that He was to rise on the third day, but they were perplexed to know what He meant. This lack of comprehension left them at the time of His death in utter hopelessness. They were bitterly disappointed. Their faith did not penetrate beyond the shadow that Satan had cast athwart their horizon. All seemed vague and mysterious to them. If they had believed the Saviour's words, how much sorrow they might have been spared! AA 25.2"
"Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:"
Both passages address the disciples' slowness to believe in Jesus's resurrection. The EGW passage provides more detail about their sorrow and lack of comprehension, but the central theme of their failure to believe is present in both.