בֶּן־אָדָ֕ם צֹפֶ֥ה נְתַתִּ֖יךָ לְבֵ֣ית יִשְׂרָאֵ֑ל וְשָׁמַעְתָּ֤ מִפִּי֙ דָּבָ֔ר וְהִזְהַרְתָּ֥ אוֹתָ֖ם מִמֶּֽנִּי׃
’Son of man, I have appointed thee a watchman unto the house of Israel; and when thou shalt hear a word at My mouth, thou shalt give them warning from Me.
Read kabbalistic (mystical) interpretation of Ezekiel 3:17: and classical mystical sources.