"Earnestness and Fervor What earnestness and fervor characterize his supplications! The hand of faith is reached upward to grasp the never-failing promises of the Most High. His soul is wrestling in agony. And he has the evidence that his prayer is heard. He knows that victory is his. If we as a people would pray as Daniel prayed, and wrestle as he wrestled, humbling our souls before God, we should realize as marked answers to our petitions as were granted to Daniel. Hear how he presses his case at the court of heaven: SL 47"
"Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much."
Both passages emphasize the importance and effectiveness of fervent prayer. EGW uses Daniel's prayer life as an example of the 'effectual fervent prayer' mentioned in James 5:16.
"And he spake a parable unto them to this end, that men ought always to pray, and not to faint;"
Both passages emphasize the importance of persistent and fervent prayer. Luke 18:1 encourages continuous prayer, while the EGW passage uses Daniel as an example of such prayer. The connection is thematic rather than a direct quote or allusion.