Hints of the War in Heaven

The Scriptural basis for the war in heaven is - you guessed it - Revelation. Before that, there is very little deviltry in the Bible.

Here are a few mentions: Isaiah 14: 12-20:

12: How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
13: For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
14: I will ascend above the heights of the clouds; I will be like the most High.
15: Yet thou shalt be brought down to hell, to the sides of the pit.
16: They that see thee shall narrowly look upon thee, and consider thee, saying, Is this the man that made the earth to tremble, that did shake kingdoms;
17: That made the world as a wilderness, and destroyed the cities thereof; that opened not the house of his prisoners?
18: All the kings of the nations, even all of them, lie in glory, every one in his own house.
19: But thou art cast out of thy grave like an abominable branch, and as the raiment of those that are slain, thrust through with a sword, that go down to the stones of the pit; as a carcase trodden under feet.
20: Thou shalt not be joined with them in burial, because thou hast destroyed thy land, and slain thy people: the seed of evildoers shall never be renowned.

Isaiah uses a Hebrew word that means "morning star," which was translated into Greek as ἑωσφόρος, which in Latin and English became "Lucifer":

H1966
הילל
הֵילֵל ‎ hêylêl
hay-lale‘
From 1984 (in the sense of brightness); the morning star: - lucifer.

In Luke 10:18 we find Jesus saying:

18 And¹¹⁶¹ he said²⁰³⁶ unto them,⁸⁴⁶ I beheld²³³⁴ Satan⁴⁵⁶⁷ as⁵⁶¹³ lightning⁷⁹⁶ fall⁴⁰⁹⁸ from¹⁵³⁷heaven.³⁷⁷²

The Greek is σατανᾶν, the Latin is Satanam.

Another passage sometimes cited is in Ezekiel 28:14 - 19:

14 Thou⁸⁵⁹ art the anointed⁴⁴⁷³ cherub³⁷⁴² that covereth;⁵⁵²⁶ and I have set⁵⁴¹⁴ thee so: thou wast¹⁹⁶¹ upon the holy⁶⁹⁴⁴ mountain²⁰²² of God;⁴³⁰ thou hast walked up and down¹⁹⁸⁰ in the midst⁸⁴³² of the stones⁶⁸ of fire.⁷⁸⁴

15 Thou⁸⁵⁹ wast perfect⁸⁵⁴⁹ in thy ways¹⁸⁷⁰ from the day^{4480 3117} that thou wast created,¹²⁵⁴till⁵⁷⁰⁴ iniquity⁵⁷⁶⁶ was found⁴⁶⁷² in thee.

16 By the multitude⁷²³⁰ of thy merchandise⁷⁴⁰⁴ they have filled⁴³⁹⁰ the midst⁸⁴³² of thee with violence,²⁵⁵⁵ and thou hast sinned:²³⁹⁸ therefore I will cast thee as profane²⁴⁹⁰ out of the mountain^{4480 2022} of God:⁴³⁰ and I will destroy⁶ thee, O covering⁵⁵²⁶ cherub,³⁷⁴² from the midst^{4480 8432} of the stones⁶⁸ of fire.⁷⁸⁴

17 Thine heart³⁸²⁰ was lifted up¹³⁶¹ because of thy beauty,³³⁰⁸ thou hast corrupted⁷⁸⁴³ thy wisdom²⁴⁵¹ by reason of⁵⁹²¹ thy brightness:³³¹⁴ I will cast⁷⁹⁹³ thee to⁵⁹²¹ the ground,⁷⁷⁶ I will lay⁵⁴¹⁴ thee before⁶⁴⁴⁰ kings,⁴⁴²⁸ that they may behold⁷²⁰⁰ thee.

18 Thou hast defiled²⁴⁹⁰ thy sanctuaries⁴⁷²⁰ by the multitude^{4480 7230} of thine iniquities,⁵⁷⁷¹ by the iniquity⁵⁷⁶⁶ of thy traffic;⁷⁴⁰⁴ therefore will I bring forth³³¹⁸ a fire⁷⁸⁴ from the midst^{4480 8432} of thee, it¹⁹³¹ shall devour³⁹⁸ thee, and I will bring⁵⁴¹⁴ thee to ashes⁶⁶⁵ upon⁵⁹²¹ the earth⁷⁷⁶ in the sight⁵⁸⁶⁹ of all³⁶⁰⁵ them that behold⁷²⁰⁰ thee.

19 All³⁶⁰⁵ they that know³⁰⁴⁵ thee among the people⁵⁹⁷¹ shall be astonished⁸⁰⁷⁴ at⁵⁹²¹ thee: thou shalt be¹⁹⁶¹ a terror,¹⁰⁹¹ and never³⁶⁹ shalt thou be any more.^{5704 5769}

The word "cherub" is from the Hebrew, and is constant through all four languages:

H3742
כּרוּב
כְּרוּב ‎ k^erûb
ker-oob‘
Of uncertain derivation; a cherub or imaginary figure: - cherub, [plural] cherubims.

The source of the "war in heaven" as a dramatic scene is Rev. 12:7-12:

7 And²⁵³² there was¹⁰⁹⁶ war⁴¹⁷¹ in¹⁷²² heaven:³⁷⁷² Michael³⁴¹³ and²⁵³² his⁸⁴⁸ angels³²fought⁴¹⁷⁰ against²⁵⁹⁶ the³⁵⁸⁸ dragon;¹⁴⁰⁴ and²⁵³² the³⁵⁸⁸ dragon¹⁴⁰⁴ fought⁴¹⁷⁰ and²⁵³²his⁸⁴⁸ angels,³²

8 And²⁵³² prevailed²⁴⁸⁰ not;³⁷⁵⁶ neither³⁷⁷⁷ was their⁸⁴⁸ place⁵¹¹⁷ found²¹⁴⁷ any more²⁰⁸⁹in¹⁷²² heaven.³⁷⁷²

9 And²⁵³² the³⁵⁸⁸ great³¹⁷³ dragon¹⁴⁰⁴ was cast out,⁹⁰⁶ that old⁷⁴⁴ serpent,³⁷⁸⁹ called²⁵⁶⁴the Devil,¹²²⁸ and²⁵³² Satan,⁴⁵⁶⁷ which deceiveth⁴¹⁰⁵ the³⁵⁸⁸ whole³⁶⁵⁰ world:³⁶²⁵ he was cast out⁹⁰⁶ into¹⁵¹⁹ the³⁵⁸⁸ earth,¹⁰⁹³ and²⁵³² his⁸⁴⁸ angels³² were cast out⁹⁰⁶ with³³²⁶him.⁸⁴⁶

10 And²⁵³² I heard¹⁹¹ a loud³¹⁷³ voice⁵⁴⁵⁶ saying³⁰⁰⁴ in¹⁷²² heaven,³⁷⁷² Now⁷³⁷ is come¹⁰⁹⁶ salvation,⁴⁹⁹¹ and²⁵³² strength,¹⁴¹¹ and²⁵³² the³⁵⁸⁸ kingdom⁹³² of our²²⁵⁷ God,²³¹⁶and²⁵³² the³⁵⁸⁸ power¹⁸⁴⁹ of his⁸⁴⁸ Christ:⁵⁵⁴⁷ for³⁷⁵⁴ the³⁵⁸⁸ accuser²⁷²⁵ of our²²⁵⁷brethren⁸⁰ is cast down,²⁵⁹⁸ which accused²⁷²³ them⁸⁴⁶ before¹⁷⁹⁹ our²²⁵⁷ God²³¹⁶ day²²⁵⁰and²⁵³² night.³⁵⁷¹

11 And²⁵³² they⁸⁴⁶ overcame³⁵²⁸ him⁸⁴⁶ by¹²²³ the³⁵⁸⁸ blood¹²⁹ of the³⁵⁸⁸ Lamb,⁷²¹and²⁵³² by¹²²³ the³⁵⁸⁸ word³⁰⁵⁶ of their⁸⁴⁸ testimony;³¹⁴¹ and²⁵³² they loved²⁵ not³⁷⁵⁶their⁸⁴⁸ lives⁵⁵⁹⁰ unto⁸⁹¹ the death.²²⁸⁸

12 Therefore^{1223 5124} rejoice,²¹⁶⁵ ye heavens,³⁷⁷² and²⁵³² ye that dwell⁴⁶³⁷ in¹⁷²² them.⁸⁴⁶Woe³⁷⁵⁹ to the³⁵⁸⁸ inhabitants²⁷³⁰ of the³⁵⁸⁸ earth¹⁰⁹³ and²⁵³² of the³⁵⁸⁸ sea!²²⁸¹ for³⁷⁵⁴the³⁵⁸⁸ devil¹²²⁸ is come down²⁵⁹⁷ unto⁴³¹⁴ you,⁵²⁰⁹ having²¹⁹² great³¹⁷³ wrath,²³⁷² because he knoweth¹⁴⁹² that³⁷⁵⁴ he hath²¹⁹² but a short³⁶⁴¹ time.²⁵⁴⁰

According to the Polyglot Bible, Satan's name is of Chaldee origin:

G4567
Σατανᾶς
Satanas
sat-an-as‘
Of Chaldee origin corresponding to 4566 (with the definite article affixed); the accuser, that is, the devil: - Satan.

More on the War in heaven from Wikipedia is here.