Passover....

Applying the blood of the lamb on the doorposts and lintel..

'Then Moses called for all the elders of Israel, and said unto them, Draw out and take you a lamb according to your families, and kill the passover. And ye shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side posts with the blood that is in the basin; and none of you shall go out at the door of his house until the morning. For the LORD will pass through to smite the Egyptians; and when he sees the blood upon the lintel, and on the two side posts, the LORD will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you. And ye shall observe this thing for an ordinance to thee and to thy sons for ever.'

Exodus 12:21-24

...and so from generation to generation, we celebrate the epic deliverance from the bondage of slavery to the true freedom our ancestors gained!
Happy Passover!!!