Biblical Hebrew

Haggai

   
חַגַּי
  "my festivals"

This name is a noun meaning, "festival-gathering, feast, pilgrim-feast"
with a plural pronominal suffix meaning, "my" added. 



Used with permission. ©2021 United Church of God, an International Association.
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Introduction
The Book of Haggai, also known as the Book of Aggeus
is a book of the Hebrew Bible or Tanakh
and has its place as the third-to-last of the Minor Prophets
It is a short book, consisting of only two chapters. 
  
Author
The Book of Haggai is named after its presumed author, 
the prophet Haggai. 
There is no biographical information given about the prophet in the book. 

Date
The historical setting dates around 520 BC before the Temple has been rebuilt.
  
Outline
Divine Announcement: 
The Command to Rebuild the Temple (1.1–15 )
Introduction: Reluctant Rebuilders (1.1–2 )
Consider your ways: fruitless prosperity (1.3–12 )
Promise and Progress (1.13–15 )

Divine Announcement: 
The Coming Glory of the Temple (2.1–2.9 )
God will fulfill his promise (2:1–5 )
Future Splendor of the temple (2:6–9 )

Divine Announcement: 
Blessings for a Defiled People (2.10–19 )
Former Misery (2.10–17 )
Future Blessing (2.18–19 )

Divine Announcement: 
Zerubbabel Chosen as a Signet (2.20–23 )

The rest of this comprehensive Wikipedia article on the book can be read here.
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Haggai 1:1b
(An extract from BHFA Volume 5.)

   
   
        הָיָה       דְבַר־      יְהוָה          בְּיַד־        חַגַּי       הַנָּבִיא

       the prophet    Haggai    by the hand of    Yahweh    the word of    it was


KJB         came the word of the LORD by Haggai the prophet
NASB the word of the LORD came by the prophet Haggai
ESV         the word of the LORD came by the hand of Haggai the prophet
NLT         the LORD gave a message through the prophet Haggai
NIV         the word of the LORD came through the prophet Haggai


 In BHS there is a footnote mentioning the Greek Septuagint.
The Greek LXX indeed has λέγων είπον meaning, 
...Haggai the prophet saying: "Say to Zerubbabel...

This is in accordance to the end of Hg 2:1 
and the beginning of Hg 2:2 in the MT. 
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Haggai 1:14d
(An extract from BHFA Volume 5.)

   
   
               בְּבֵית־         יְהוָה    צְבָאוֹת     אֱלֹהֵיהֶם׃

                       their God        armies      YHWH      in the house of


KJB       in the house of the LORD of hosts, their God,
ESV      on the house of the LORD of hosts, their God,
NASB   on the house of the LORD of armies, their God,
NLT      on the house of their God, the LORD of Heaven’s Armies,
NIV      on the house of the LORD Almighty, their God,
GNT     on the Temple of the LORD Almighty, their God,
ISV      on the house of their God, the LORD of the Heavenly Armies.


                                          צְבָאוֹת

Noun, f. pl. form of   צָבָא  meaning, "army, war, warfare." 
It occurs 283 times in the Hebrew Bible, and in almost all of these cases, in combination with Yahweh. 
It is first used in 1 Sm 1:3, and most frequently used in Isaiah (62 times) and Jeremiah (82 times). 

The most common translation into English is, "LORD of Hosts" (KJB, ESV, ERV), but other alternatives are, "LORD Almighty" (NIV, GNT), "LORD of Heaven's Armies" (NLT, ISV), "LORD All-Powerful" (CEV), "Yahweh of Armies" (WEB), "Jehovah of hosts" (ASV), "LORD of armies" (NASB).

Haggai uses this appelation 14 times (1:2,5,7,9,14; 2:4,6,7,8,9,9,11,23,23).

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