Discovery BoxExodus 12:7 
Context12:7 They will take some of the blood and put it on the two side posts and top of the doorframe of the houses where they will eat it.
Exodus 12:13
Context12:13 The blood will be a sign for you on the houses where you are, so that when I see 1 the blood I will pass over you, 2 and this plague 3 will not fall on you to destroy you 4 when I attack 5 the land of Egypt. 6
Exodus 12:23
Context12:23 For the Lord will pass through to strike Egypt, and when he sees 7 the blood on the top of the doorframe and the two side posts, then the Lord will pass over the door, and he will not permit the destroyer 8 to enter your houses to strike you. 9
1 tn Both of the verbs for seeing and passing over are perfect tenses with vav (ו) consecutives: וּפָסַחְתִּי…וְרָאִיתִי (vÿra’iti...ufasakhti); the first of these parallel verb forms is subordinated to the second as a temporal clause. See Gesenius’s description of perfect consecutives in the protasis and apodosis (GKC 494 §159.g).
2 tn The meaning of the verb is supplied in part from the near context of seeing the sign and omitting to destroy, as well as the verb at the start of verse 12 “pass through, by, over.” Isa 31:5 says, “Just as birds hover over a nest, so the
3 tn The word “plague” (נֶגֶף, negef) is literally “a blow” or “a striking.” It usually describes a calamity or affliction given to those who have aroused God’s anger, as in Exod 30:12; Num 8:19; 16:46, 47; Josh 22:17 (S. R. Driver, Exodus, 92-93).
4 tn Heb “for destruction.” The form מַשְׁחִית (mashkhit) is the Hiphil participle of שָׁחַת (shakhat). The word itself is a harsh term; it was used to describe Yahweh’s destruction of Sodom and Gomorrah (Gen 13:10).
5 tn בְּהַכֹּתִי (bÿhakkoti) is the Hiphil infinitive construct from נָכָה (nakhah), with a preposition prefixed and a pronominal suffix added to serve as the subjective genitive – the subject of this temporal clause. It is also used in 12:12.
6 sn For additional discussions, see W. H. Elder, “The Passover,” RevExp 74 (1977): 511-22; E. Nutz, “The Passover,” BV 12 (1978): 23-28; H. M. Kamsler, “The Blood Covenant in the Bible,” Dor le Dor 6 (1977): 94-98; A. Rodriguez, Substitution in the Hebrew Cultus; B. Ramm, “The Theology of the Book of Exodus: A Reflection on Exodus 12:12,” SwJT 20 (1977): 59-68; and M. Gilula, “The Smiting of the First-Born: An Egyptian Myth?” TA 4 (1977): 94-85.
7 tn The first of the two clauses begun with perfects and vav consecutives may be subordinated to form a temporal clause: “and he will see…and he will pass over,” becomes “when he sees…he will pass over.”
8 tn Here the form is the Hiphil participle with the definite article. Gesenius says this is now to be explained as “the destroyer” although some take it to mean “destruction” (GKC 406 §126.m, n. 1).
9 tn “you” has been supplied.
