as the nation of Jehovah, its first-born of man and beast were spared, and for that reason they were henceforth to be sanctified to Jehovah. In what way, is more clearly defined in Num 8:12.
verses 3-7
The directions as to the seven days' feast of unleavened bread (Exo 12:15-20) were made known by Moses to the people on the day of the Exodus, at the first station, namely, Succoth; but in the account of this, only the most important points are repeated, and the yearly commemoration is enjoined. In Exo 13:3, Egypt is called a “slave-house,” inasmuch as Israel was employed in slave-labour there, and treated as a slave population (cf. Exo 20:2; Deu 5:6; Deu 6:12, etc.). יד הזק “strength of hand,” in Exo 13:3, Exo 13:14, and Exo 13:16, is more emphatic than the more usual חזקה יד (Exo 3:19, etc.). - On Exo 13:5, see Exo 3:8, and Exo 12:25. In Exo 13:6, the term “feast to Jehovah” points to the keeping of the seventh day by a holy convocation and the suspension of work (Exo 12:16). It is only of the seventh day that this is expressly stated, because it was understood as a matter of course, that the first was a feast of Jehovah.
Verse 8
“because of that which Jehovah did to me” (זה in a relative sense, is qui, for אשׁר, see Ewald, §331): sc., “I eat unleavened bread,” or, “I observe this service.” This completion of the imperfect sentence follows readily from the context, and the whole verse may be explained from Exo 12:26-27.
Verse 9
The festival prescribed was to be to Israel “for a sign upon its hand, and for a memorial between the eyes.” These words presuppose the custom of wearing mnemonic signs upon the hand and forehead; but they are not to be traced to the heathen custom of branding soldiers and slaves with marks upon the hand and forehead. For the parallel passages in Deu 6:8 and Deu 11:18, “bind them for a sign upon your hand,” are proofs that the allusion is neither to branding nor writing on the hand. Hence the sign upon the hand probably consisted of a bracelet round the wrist, and the ziccaron between the eyes, of a band worn upon the forehead. The words are then used figuratively, as a proverbial expression employed to give emphasis to the injunction to bear this precept continually in mind, to be always mindful to observe it. This is still more apparent from the reason assigned, “that the law of Jehovah may be in thy mouth.” For it was not by mnemonic slips upon the hand and forehead that a law was so placed in the mouth as to be talked of continually (Deu 6:7; Deu 11:19),
