"And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death."
This is a direct quote from Revelation 12:11, making it a clear and explicit allusion.
"Cain the murderer was soon called to answer for his crime. “The Lord said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?” Cain had gone so far in sin that he had lost a sense of the continual presence of God and of His greatness and omniscience. So he resorted to falsehood to conceal his guilt. PP 77.2"
"And the Lord said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother’s keeper?"
This is a direct quote from Genesis 4:9, making it a clear and explicit allusion.
"Again the Lord said to Cain, “What hast thou done? The voice of thy brother's blood crieth unto Me from the ground.” God had given Cain an opportunity to confess his sin. He had had time to reflect. He knew the enormity of the deed he had done, and of the falsehood he had uttered to conceal it; but he was rebellious still, and sentence was no longer deferred. The divine voice that had been heard in entreaty and admonition pronounced the terrible words: “And now art thou cursed from the earth, which hath opened her mouth to receive thy brother's blood from thy hand. When thou tillest the ground, it shall not henceforth yield unto thee her strength; a fugitive and a vagabond shalt thou be in the earth.” PP 77.3"
"And he said, What hast thou done? the voice of thy brother’s blood crieth unto me from the ground."
The EGW passage directly quotes and elaborates on Genesis 4:10, recounting God's confrontation with Cain after he killed Abel.