"But the servant of God was still overwhelmed by the thought of the strange and wonderful work before him. In his distress and fear he now pleaded as an excuse a lack of ready speech: “O my Lord, I am not eloquent, neither heretofore, nor since Thou hast spoken unto Thy servant; but I am slow of speech, and of a slow tongue.” He had been so long away from the Egyptians that he had not so clear knowledge and ready use of their language as when he was among them. PP 254.1"
"And Moses said unto the Lord, O my Lord, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech, and of a slow tongue."
The EGW passage is a direct quote from Exodus 4:10.
"promised to remove all difficulties, and to give him final success, then any further shrinking back and complaining of his unfitness showed distrust of God. It implied a fear that God was unable to qualify him for the great work to which He had called him, or that He had made a mistake in the selection of the man. PP 254.2"
"And the Lord said unto Moses, Is the Lord’s hand waxed short? thou shalt see now whether my word shall come to pass unto thee or not."
Both passages deal with the theme of doubting God's ability and power. However, the connection is not a direct quote or explicit reference, but rather a shared theme. Confidence adjusted down slightly.
"Moses was now directed to Aaron, his elder brother, who, having been in daily use of the language of the Egyptians, was able to speak it perfectly. He was told that Aaron was coming to meet him. The next words from the Lord were an unqualified command: PP 254.3"
"And the anger of the Lord was kindled against Moses, and he said, Is not Aaron the Levite thy brother? I know that he can speak well. And also, behold, he cometh forth to meet thee: and when he seeth thee, he will be glad in his heart."
The EGW passage directly references and summarizes Exodus 4:14.
"And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do."
The EGW passage directly alludes to the events described in Exodus 4:15, making it an explicit allusion.
"“Thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do. And he shall be thy spokesman unto the people: and he shall be, even he shall be to thee instead of a mouth, and thou shalt be to him instead of God. And thou shalt take this rod in thine hand, wherewith thou shalt do signs.” He could make no further resistance, for all ground for excuse was removed. PP 254.4"
"And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do."
The EGW passage directly quotes Exodus 4:15.
"And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do. And he shall be thy spokesman unto the people: and he shall be, even he shall be to thee instead of a mouth, and thou shalt be to him instead of God."
The EGW passage is a direct quote from Exodus 4:15-16.