Revelation 2:29

 He who has an ear, let him hear what the Spirit says to the churches.”

·        It is a proverbial expression, implying that the highest attention should be given to what was spoken  (Barnes)

·        anything serious, and of great importance, was delivered; and which required attention, and was not easily understood:  (Gills)

 Isaiah 48:16  “Come near to Me, hear this:  I have not spoken in secret from the beginning; from the time that it was, I was there.  And now the Lord GOD and His Spirit have sent Me.”

 

Zechariah 7:12  “Yes, they made their hearts like flint, refusing to hear the law and the words which the LORD of hosts had sent by His Spirit through the former prophets.  Thus great wrath came from the LORD of hosts.