"promise that they would do much toward defraying our expenses, but that he would do what he could. We had no means with which to travel. My husband's health was poor, but the way opened for him to work in the hayfield, and he decided to accept the work. LS 108.3"
"But my God shall supply all your need according to his riches in glory by Christ Jesus."
The EGW passage describes a situation of need and a way being opened to meet that need. This aligns with the principle in Philippians 4:19 that God will supply all needs. While not a direct quote, the underlying principle of God's provision is present in both passages.
"But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you."
The EGW passage describes a situation where the Whites are prioritizing their work (implied to be for God's cause) despite lacking resources, trusting that their needs will be met. This echoes the principle in Matthew 6:33 of seeking God's kingdom first and trusting that material needs will be provided. The connection is thematic rather than a direct quote or allusion.