"Words like these destroyed the hopes of many of the Israelites. The case appeared to them very much as the Egyptians had represented. It was true that they were slaves, and must endure whatever their cruel taskmasters might choose to inflict. Their children had been hunted and slain, and their own lives were a burden. Yet they were worshiping the God of heaven. If Jehovah were indeed above all gods, surely He would not thus leave them in bondage to idolaters. But those who were true to God understood that it was because of Israel's departure from Him—because of their disposition to marry with heathen nations, thus being led into idolatry— that the Lord had permitted them to become bondmen; and they confidently assured their brethren that He would soon break the yoke of the oppressor. PP 260.1"
"Awake, why sleepest thou, O Lord? arise, cast us not off for ever."
Both passages address the question of why God allows suffering and oppression. The EGW passage explains the Israelites' questioning of God's power in light of their bondage, while Psalm 44:23 is a direct plea for God to awaken and intervene. There's a clear thematic overlap, although the EGW passage provides a specific explanation related to Israel's actions.
"The Lord directed Moses to go again to the people and repeat the promise of deliverance, with a fresh assurance of divine favor. He went as he was commanded; but they would not listen. Says the Scripture, “They hearkened not ... for anguish of spirit, and for cruel bondage.” Again the divine message came to Moses, “Go in, speak unto Pharaoh king of Egypt, that he let the children of Israel go out of his land.” In discouragement he replied, “Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me?” He was told to take Aaron with him and go before Pharaoh, and again demand “that he send the children of Israel out of his land.” PP 260.3"
"And Moses spake before the Lord, saying, Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me, who am of uncircumcised lips?"
EGW directly quotes and references Exodus 6:12, making a clear and explicit allusion to the verse. The context and content are nearly identical.