Shemot 12:20-22

Orthodox Jewish Bible

²⁰ Ye shall eat nothing leavened; in all your dwellingplaces shall ye eat matzot.

²¹ Then Moshe called for all the Ziknei Yisroel, and said unto them, Draw out as separate and take for yourselves a lamb according to your mishpokhot, and slaughter (shachat) the Pesach [offering, i.e., Pesach lamb (see Yeshayah 53:7)].

²² And ye shall take a bunch of hyssop, and dip it in the dahm that is in the basin, and strike the mashkof (lintel) and the two mezuzot (door sideposts) with the dahm that is in the basin; and none of you shall go out the door of his bais until boker.