The Meaning of Numbers: The Number 1,000
The meaning of the number 1,000, like other numerals in this series, can vary based on its usage in the Bible.
Samson, one of Israel's judges and the first person the Bible states was under a Nazarite vow from birth, was charged by God to free the Israelites from the brutal Philistines. One of the ways he did this was to use his miraculous strength and stamina, plus the jawbone of an ass, to kill 1,000 men in the Philistine army.
And he (Samson) found a new jawbone of a donkey, and put forth his hand and took it, and killed a thousand men with it. And Samson said, "With the jawbone of a donkey, heaps upon heaps, with the jawbone of a donkey I have killed a thousand men" (Judges 15:15 - 16, HBFV throughout).
Prophecy and the number one thousand
One principle of Biblical prophecy is that a prophetic day can equal one, or 1,000, years in human history. This link is revealed to us directly by God in the prophecy he gave to Ezekiel. The prophet was to convey, in a most unusual way, the length of Israel and Judah's punishment for their many sins.
Also lie on your left side, and lay the iniquity of the house of Israel on it; according to the number of days that you shall lie on it, you shall bear their iniquity.
For I have laid on you the YEARS of their iniquity, according to the number of the DAYS, three hundred and ninety days . . . And when you have fulfilled them, lie again on your right side, and you shall bear the iniquity of the house of Judah forty days; A DAY FOR A YEAR . . . (Ezekiel 4:4 - 6).
Moses, in the only Psalm directly credited to him, links one day from God's perspective with 1,000 years on earth.
For a thousand years in Your sight are as yesterday when it is past, and as a watch in the night (Psalm 90:4).
The Apostle Peter, in his second epistle, confirms the link between a prophetic day and 1,000 years.
Now, beloved, do not let this one fact be hidden from you: that with the Lord, one day is as a thousand years . . . (2Peter 3:8).
Satan, salvation and the number 1,000
The number one thousand plays a critical role in God's plan, especially concerning his (and our) adversary the devil. Before Christ establishes the Kingdom of God on the earth, at his Second Coming, he will first have Satan restrained in a spiritual prison. The duration of his imprisonment will be 1,000 years.
Then I saw an angel descending from heaven, having the key of the abyss, and a great chain in his hand. And he took hold of the dragon, the ancient serpent, who is the Devil and Satan, and bound him for a thousand years.
Then he cast him into the abyss, and locked him up, and sealed the abyss over him, so that he would not deceive the nations any longer until the thousand years were fulfilled . . . (Revelation 20:1 - 3).
Jesus, as King of Kings and Lord of Lords, will then rule the earth from Jerusalem for 1,000 years (Revelation 19:16, 20:4, 6). His period of rule is commonly referred to as the Millennium or his millennial reign. The second resurrection of the dead will occur after this period of his rule.
Additional info on the Biblical Meaning of 1,000
Moses, in one of his final messages to the children of Israel, asks God to bless the people and make the nation 1,000 times bigger than they were (Deuteronomy 1:11)! He also reminded the people that God's blessings and mercy are guaranteed, to a thousand generations, toward those who love and obey him (7:9). This wonderful promise is partly repeated in Psalm 105:8.
God promises, to those who do His will, that they will be divinely protected. One person will be able to chase away one thousand while countless others who attack will fall and cause them no harm (Joshua 23:10, Psalm 91:7).