Dragon- a symbol of covetousness, Nebuchadnezzer and Belshazzar

Dragon, a symbol of covetousness

Dragon (whale)The symbol of covetousness, an abysmal devourer

H8577  ,  , (The second form used in Ezekiel 29:3); intensive from the same as H8565; a marine or land monster, that is, sea serpent or jackal:—dragon, sea-monster, serpent, whale.

H8565 , , , From an unused root probably meaning to elongate; a monster (as preternaturally formed), that is, a sea serpent (or other huge marine animal); also a jackal (or other hideous land animal):—dragon, whale. Compare H8577.

Revelation 12 ²And she being with child cried, travailing in birth, and pained to be delivered. ³And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. ⁴And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born. ⁵And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne. ⁶And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days. ⁷And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, ⁸And prevailed not; neither was their place found any more in heaven. ⁹And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. ¹⁰And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.

The Biblical dragon pharaoh

Ezek 29:3 Speak, and say, Thus saith the Lord GOD; Behold, I am against thee, Pharaoh king of Egypt, the great dragon that lieth in the midst of his rivers, which hath said, My river is mine own, and I have made it for myself.

The Dragon Nebuchadnezzar, King of Babylon, and Bel( shazzar ) 

Jeremiah 51 ³³For thus saith the LORD of hosts, the God of Israel; The daughter of Babylon is like a threshingfloor, it is time to thresh her: yet a little while, and the time of her harvest shall come. ³⁴Nebuchadrezzar the king of Babylon hath devoured me, he hath crushed me, he hath made me an empty vessel, he hath swallowed me up like a dragon, he hath filled his belly with my delicates, he hath cast me out. ³⁵The violence done to me and to my flesh be upon Babylon, shall the inhabitant of Zion say; and my blood upon the inhabitants of Chaldea, shall Jerusalem say. 
44 And I will punish Bel in Babylon, and I will bring forth out of his mouth that which he hath swallowed up:and the nations shall not flow together any more unto him: yea, the wall of Babylon shall fall.    

Daniel 4 ²⁴This is the interpretation, O king, and this is the decree of the most High, which is come upon my lord the king: ²⁵That they shall drive thee from men, and thy dwelling shall be with the beasts of the field, and they shall make thee to eat grass as oxen, and they shall wet thee with the dew of heaven, and seven times shall pass over thee, till thou know that the most High ruleth in the kingdom of men, and giveth it to whomsoever he will. ²⁶And whereas they commanded to leave the stump of the tree roots; thy kingdom shall be sure unto thee, after that thou shalt have known that the heavens do rule. ²⁷Wherefore, O king, let my counsel be acceptable unto thee, and break off thy sins by righteousness, and thine iniquities by showing mercy to the poor; if it may be a lengthening of thy tranquillity.

²⁸All this came upon the king Nebuchadnezzar. ²⁹At the end of twelve months he walked in the palace of the kingdom of Babylon. ³⁰The king spake, and said, Is not this great Babylon, that I have built for the house of the kingdom by the might of my power, and for the honour of my majesty? ³¹While the word was in the king's mouth, there fell a voice from heaven, saying, O king Nebuchadnezzar, to thee it is spoken; The kingdom is departed from thee.
³²And they shall drive thee from men, and thy dwelling shall be with the beasts of the field: they shall make thee to eat grass as oxen, and seven times shall pass over thee, until thou know that the most High ruleth in the kingdom of men, and giveth it to whomsoever he will.
³³The same hour was the thing fulfilled upon Nebuchadnezzar: and he was driven from men, and did eat grass as oxen, and his body was wet with the dew of heaven, till his hairs were grown like eagles' feathers, and his nails like birds' claws. ³⁴And at the end of the days I Nebuchadnezzar lifted up mine eyes unto heaven, and mine understanding returned unto me, and I blessed the most High, and I praised and honoured him that liveth for ever, whose dominion is an everlasting dominion, and his kingdom is from generation to generation: ³⁵And all the inhabitants of the earth are reputed as nothing: and he doeth according to his will in the army of heaven, and among the inhabitants of the earth: and none can stay his hand, or say unto him, What doest thou? ³⁶At the same time my reason returned unto me; and for the glory of my kingdom, mine honour and brightness returned unto me; and my counsellors and my lords sought unto me; and I was established in my kingdom, and excellent majesty was added unto me. ³⁷Now I Nebuchadnezzar praise and extol and honour the King of heaven, all whose works are truth, and his ways judgment: and those that walk in pride he is able to abase.