"Jesus plucked the beautiful lily, and placed it in the hands of children and youth; and as they looked into His own youthful face, fresh with the sunlight of His Father's countenance, He gave the lesson, “Consider the lilies of the field, how they grow [in the simplicity of natural beauty]; they toil not, neither do they spin; and yet I say unto you, that even Solomon in all his glory was not arrayed like one of these.” Then followed the sweet assurance and the important lesson, “Wherefore, if God so clothe the grass of the field, which today is, and tomorrow is cast into the oven, shall He not much more clothe you, O ye of little faith?” COL 19.1"
"And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Wherefore, if God so clothe the grass of the field, which to day is, and to morrow is cast into the oven, shall he not much more clothe you, O ye of little faith?"
EGW directly quotes and elaborates on Matthew 6:28-30, making it a clear explicit allusion.
"But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you."
EGW directly quotes Matthew 6:33.
"And why take ye thought for raiment? Consider the lilies of the field, how they grow; they toil not, neither do they spin: And yet I say unto you, That even Solomon in all his glory was not arrayed like one of these. Wherefore, if God so clothe the grass of the field, which to day is, and to morrow is cast into the oven, shall he not much more clothe you, O ye of little faith? Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed? (For after all these things do the Gentiles seek:) for your heavenly Father knoweth that ye have need of all these things. But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you."
Ellen White directly references Matthew 6:28-33 in this passage.