“Repent, for the kingdom of heaven is at hand.” — Mt 3:2 

This is synonymous with: 

Therefore I will make the heavens tremble, And the earth will be shaken from its place at the fury of the Lord of hosts in the day of His burning anger. — Isaiah 13:13 

“Repent!” “The kingdom is imminent!” These are common themes in the OT and NT to live in light of knowing God’s coming wrath and to be spared of it to be part of His coming Kingdom. - TJ Sewob