"292.1 They had not as yet suffered from hunger; their present wants were supplied, but they feared for the future. They could not understand how these vast multitudes were to subsist in their travels through the wilderness, and in imagination they saw their children famishing. The Lord permitted difficulties to surround them, and their supply of food to be cut short, that their hearts might turn to Him who had hitherto been their Deliverer. If in their want they would call upon Him, He would still grant them manifest tokens of His love and care. He had promised that if they would obey His commandments, no disease should come upon them, and it was sinful unbelief on their part to anticipate that they or their children might die of hunger. PP 292.2"
"Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed?"
The EGW passage describes the Israelites' fear of hunger in the wilderness, despite God's past provision. This fear and anxiety about future needs thematically parallels the teaching in Matthew 6:31 to not worry about what to eat or drink. While not a direct quote or allusion, the underlying principle of trusting in God's provision is shared between the two passages.
God had promised to be their God, to take them to Himself as a people, and to lead them to a large and good land; but they were ready to faint at every obstacle encountered in the way to that land. In a marvelous manner He had brought them out from their bondage in Egypt, that He might elevate and ennoble them and make them a praise in the earth. But it was necessary for them to encounter difficulties and to endure privations. God was bringing them from a state of degradation and fitting them to occupy an honorable place among the nations and to receive important and sacred trusts. Had they possessed faith in Him, in view of all that He had wrought for them, they would cheerfully have borne inconvenience, privation, and even real suffering; but they were unwilling to trust the Lord any further than they could witness the continual evidences of His power. They forgot their bitter service in Egypt. They forgot the goodness and power of God displayed in their behalf in their deliverance f…
"And I will take you to me for a people, and I will be to you a God: and ye shall know that I am the Lord your God, which bringeth you out from under the burdens of the Egyptians."
The EGW passage directly references and expands upon the promise in Exodus 6:7, making a clear connection.