"Work in faith, and leave results with God. Pray in faith, and the mystery of His providence will bring its answer. At times it may seem that you cannot succeed. But work and believe, putting into your efforts faith, hope, and courage. After doing what you can, wait for the Lord, declaring His faithfulness, and He will bring His word to pass. Wait, not in fretful anxiety, but in undaunted faith and unshaken trust. 7T 245.2"
"Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them."
The EGW passage strongly reflects the principle of faith in prayer, as highlighted in Mark 11:24. Both passages emphasize believing that you receive what you ask for in prayer, even before seeing the results.
"Commit thy way unto the Lord; trust also in him; and he shall bring it to pass."
The EGW passage closely aligns with the sentiment of Psalm 37:5. Both passages encourage trusting in the Lord and committing one's way to Him, with the assurance that He will bring it to pass. The emphasis on waiting for the Lord after doing what one can is a clear parallel.