"These words of the prophet declare the solemn responsibility resting upon those who are appointed as guardians of the church, stewards of the mysteries of God. They are to stand as watchmen on the walls of Zion, to sound the note of alarm at the approach of the enemy. If for any reason their spiritual senses become so benumbed that they are unable to discern danger, and through their failure to give warning the people perish, God will require at their hands the blood of those who are lost. GW 15.1"
"But if the watchman see the sword come, and blow not the trumpet, and the people be not warned; if the sword come, and take any person from among them, he is taken away in his iniquity; but his blood will I require at the watchman’s hand."
The EGW passage directly references and expands upon the imagery and warning in Ezekiel 33:6 regarding the responsibility of watchmen.