Blessed be the God and Father of our Lord Jesus Christ, the Father of compassion and God of all encouragement, who encourages us in our every affliction, so that we may be able to encourage those who are in any affliction with the encouragement with which we ourselves are encouraged by God. - 2 Corinthians 1:3-4

Zechariah 12:10:
  I will pour out on the house of David and on the inhabitants of Jerusalem, the Spirit of grace and of supplication, so that they will look on Me whom they have pierced; and they will mourn for Him, as one mourns for an only son, and they will weep bitterly over Him like the bitter weeping over a firstborn.


Romans 11:26–27
And so all Israel will be saved, as it is written: ‘The Deliverer will come from Zion, He will remove ungodliness from Jacob. This is My covenant with them, when I take away their sins.’ 

And I saw heaven opened; and behold, a white horse, and He who sat upon it is called Faithful and True; and in righteousness He judges and wages war. His eyes are a flame of fire, and upon His head are many diadems; and He has a name written upon Him which no one knows except Himself. He is clothed with a robe dipped in blood; and His name is called The Word of God. And the armies which are in heaven, clothed in fine linen, white and clean, were following Him on white horses. — Revelation 19:11-14 

And from His mouth comes a sharp sword, so that with it He may smite the nations; and He will rule them with a rod of iron; and He treads the wine press of the fierce wrath of God, the Almighty. And on His robe and on His thigh He has a name written, ‘King of Kings, and Lord of Lords.’ 

The Day of Atonement (Yom Kippur) follows closely after Rosh Hashanah. We read in Leviticus 23:26-28:

The Lord spoke to Moses, saying, ‘On exactly the tenth day of this seventh month is the Day of Atonement; it shall be a holy convocation for you, and you shall humble your souls and present an offering by fire to the Lord. You shall not do any work on this same day, for it is a day of atonement, to make atonement on your behalf before the Lord your God.’

And Exodus 30:10 says:

And Aaron shall make atonement on its horns once a year; he shall make atonement on it with the blood of the sin offering of atonement once a year throughout your generations. It is most holy to the Lord.