The Passover Revealed
"And it shall be, when your children say to you, 'What do you mean by this service?' that you shall say, 'It is the Passover sacrifice of the LORD, who passed over the houses of the children of Israel when He struck the Egyptians and delivered our households.'" -- Exodus 12:26-27.
"And you shall observe this thing as an ordinance for you and your sons forever." -- Exodus 12:24.
Jerusalem, the city where God placed His Name, and the Passover lambs were killed.