A bunch of hyssop; so the Hebrew word is rightly rendered, as appears from Hebrews 9:19. The door of his house, i.e. of the house wherein he did eat the passover, which ofttimes was his neighbour's house: see Exodus 12:4. Until the morning; till the beginning of the morning after midnight, and after the slaughter of the Egyptians first-born; which may reconcile those scriptures that seem to contradict one another, while some affirm they went out of Egypt by night, and others by day, for they went out in the morning very early when it was yet dark, as it is expressed in a like case, 1 Thessalonians 20:1.
Related Commentaries of Exodus 12:22
Exodus 12:22
22 And ye shall take a bunch of hyssop, and dip it in the blood that is in the bason, and strike the lintel and the two side posts with the blood that is in the bason; and none of you shall go out at the door of his house until the morning.