'Day of the Lord' in the Bible

For the Lord of hosts will have a day of reckoningAgainst all who are proud and arrogantAnd against all who are lifted up,That they may be degraded.

Wail, for the day of the Lord is at hand!It will come as destruction from the Almighty (All Sufficient One—Invincible God)!

Listen carefully, the day of the Lord is coming,Cruel, with wrath and raging anger,To make the land a horror [of devastation];And He shall exterminate its sinners from it.

On every lofty mountain and on every high hill there will be streams of water on the day of the great slaughter (the day of the Lord), when the towers fall [and all His enemies are destroyed].

“If you turn back your foot from [unnecessary travel on] the Sabbath,From doing your own pleasure on My holy day,And call the Sabbath a [spiritual] delight, and the holy day of the Lord honorable,And honor it, not going your own wayOr engaging in your own pleasureOr speaking your own [idle] words,