Jehovah had instructed Moses: “They [the Israelites] must take some of the blood [of the Passover lamb] and splash it upon the two doorposts and the upper part of the doorway belonging to the houses in which they will eat it....
فَعِنْدَ مَجِيءِ ٱلضِّيقِ ٱلْعَظِيمِ ،‏ سَتَنْهَمِرُ دُمُوعُ ٱلْفَرَحِ وَٱلْحَمْدِ مِنْ عُيُونِ ٱلَّذِينَ نَشَدُوا هذِهِ ٱلْحِمَايَةَ .‏