Lk 23:34, Acts 3:14-15,17, Heb 6:20, Heb 9:11-12
In the Old Testament, God commanded the Israelites to build a city of refuge where those who accidentally killed a man could escape. (Joshua 20:2-3,6)
Joshua 20:2 Speak to the children of Israel, saying, Appoint out for you cities of refuge, whereof I spake unto you by the hand of Moses: 3 That the slayer that killeth any person unawares and unwittingly may flee thither: and they shall be your refuge from the avenger of blood. 6 And he shall dwell in that city, until he stand before the congregation for judgment, and until the death of the high priest that shall be in those days: then shall the slayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.
The people of Israel did not know that Jesus was the Christ, so they accidentally killed the Christ, Jesus. (Luke 23:34, Acts 3:14-15,17)
Luke 23:34 Then said Jesus, Father, forgive them; for they know not what they do. And they parted his raiment, and cast lots.
Acts 3:14 But ye denied the Holy One and the Just, and desired a murderer to be granted unto you; 15 And killed the Prince of life, whom God hath raised from the dead; whereof we are witnesses. 17 And now, brethren, I wot that through ignorance ye did it, as did also your rulers.
As the true high priest, Jesus died on the cross for our sins. (Heb 6:20, Heb 9:11-12)
Heb 6:20 Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.
Heb 9:11 But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building; 12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
Jesus is our city of refuge. (Mt 11:28)
Mt 11:28 Come unto me, all ye that labour and are heavy laden, and I will give you rest.