"Little did Belshazzar think that there was a heavenly Witness to his idolatrous revelry; that a divine Watcher, unrecognized, looked upon the scene of profanation, heard the sacrilegious mirth, beheld the idolatry. But soon the uninvited Guest made His presence felt. When the revelry was at its height a bloodless hand came forth and traced upon the walls of the palace characters that gleamed like fire—words which, though unknown to the vast throng, were a portent of doom to the now conscience-stricken king and his guests. PK 524.1"
"In the same hour came forth fingers of a man’s hand, and wrote over against the candlestick upon the plaister of the wall of the king’s palace: and the king saw the part of the hand that wrote."
The EGW passage directly recounts and expands upon the biblical account of the hand writing on the wall in Daniel 5. The details provided by EGW are elaborations on the core event described in Daniel 5:5.
"Neither is there any creature that is not manifest in his sight: but all things are naked and opened unto the eyes of him with whom we have to do."
While not a direct quote or allusion, the idea of a 'heavenly Witness' and 'divine Watcher' in EGW's writing echoes the sentiment of God's omnipresence and omniscience as expressed in Hebrews 4:13. The connection is thematic, focusing on God's awareness of human actions.
"Hushed was the boisterous mirth, while men and women, seized with nameless terror, watched the hand slowly tracing the mysterious characters. Before them passed, as in panoramic view, the deeds of their evil lives; they seemed to be arraigned before the judgment bar of the eternal God, whose power they had just defied. Where but a few moments before had been hilarity and blasphemous witticism, were pallid faces and cries of fear. When God makes men fear, they cannot hide the intensity of their terror. PK 524.2"
"Then the king’s countenance was changed, and his thoughts troubled him, so that the joints of his loins were loosed, and his knees smote one against another."
EGW's description of the terror and fear experienced by Belshazzar and his guests directly parallels the description of the king's reaction in Daniel 5:6. The physical and emotional responses are very similar, indicating a clear connection.