"There are many who feel that they cannot get along without flesh food; but if these would place themselves on the Lord's side, resolutely resolved to walk in the way of His guidance, they would receive strength and wisdom as did Daniel and his fellows. They would find that the Lord would give them sound judgment. Many would be surprised to see how much could be saved for the cause of God by acts of self-denial. The small sums saved by deeds of sacrifice will do more for the upbuilding of the cause of God than larger gifts will accomplish that have not called for denial of self. 9T 157.4"
"Prove thy servants, I beseech thee, ten days; and let them give us pulse to eat, and water to drink."
EGW explicitly refers to Daniel and his fellows and their experience with diet as described in Daniel 1.