Easter - the most important event in history - when Jesus once forever been the atoning sacrifice for all men's sins.

Isaiah 53,3-5:
He was despised and forsaken of men, A man of sorrows and acquainted with grief; And like one from whom men hide their face He was despised, and we did not esteem Him.
Surely our griefs He Himself bore, And our sorrows He carried; Yet we ourselves esteemed Him stricken, Smitten of God, and afflicted.
But He was pierced through for our transgressions,
He was crushed for our iniquities; The chastening for our well-being fell upon Him, And by His scourging we are healed.

John 1,29:
The next day he saw Jesus coming to him and said, "Behold, the Lamb of God who takes away the sin of the world!

Rom.4,25:
He who was delivered over because of our transgressions, and was raised because of our justification.

1.John 2,2:
He himself is the atoning sacrifice for our sins, and not only for ours, but also for those of the whole world