"righteousness of their cause, that people withstood the mightiest armies that could be brought against them. Again and again the emperor, raising fresh armies, invaded Bohemia, only to be ignominiously repulsed. The Hussites were raised above the fear of death, and nothing could stand against them. A few years after the opening of the war, the brave Ziska died; but his place was filled by Procopius, who was an equally brave and skillful general, and in some respects a more able leader. GC 116.1"
"What shall we then say to these things? If God be for us, who can be against us?"
The verse speaks of God's protection, and the EGW passage describes the Hussites' victories despite being outnumbered, suggesting a similar divine support. However, the connection is not direct or explicit.
The enemies of the Bohemians, knowing that the blind warrior was dead, deemed the opportunity favorable for recovering all that they had lost. The pope now proclaimed a crusade against the Hussites, and again an immense force was precipitated upon Bohemia, but only to suffer terrible defeat. Another crusade was proclaimed. In all the papal countries of Europe, men, money, and munitions of war were raised. Multitudes flocked to the papal standard, assured that at last an end would be made of the Hussite heretics. Confident of victory, the vast force entered Bohemia. The people rallied to repel them. The two armies approached each other until only a river lay between them. “The crusaders were in greatly superior force, but instead of dashing across the stream, and closing in battle with the Hussites whom they had come so far to meet, they stood gazing in silence at those warriors.”—Wylie, b. 3, ch. 17. Then suddenly a mysterious terror fell upon the host. Without striking a blow, that mi…
"But if it be of God, ye cannot overthrow it; lest haply ye be found even to fight against God."
The verse warns against fighting against God's work, and the EGW passage describes the crusaders' fear and defeat, implying that they were indeed fighting against something divinely ordained. The connection is thematic, not a direct quote or allusion.