Seven days it shall be with his dam - For the mother's health it was necessary that the young one should suck so long; and prior to this time the process of nutrition in a young animal can scarcely be considered as completely formed. Among the Romans lambs were not considered as pure or clean before the eighth day; nor calves before the thirtieth: Pecoris faetus die octavo purus est, bovis trigesimo - Plin. Hist. Nat., lib. viii.

likewise

Deuteronomy 15:19 All the firstling males that come of your herd and of your flock you shall sanctify to the LORD your God...

seven days

Leviticus 22:27 When a bullock, or a sheep, or a goat, is brought forth, then it shall be seven days under the dam...

Ciii. Zacchæus. Parable of the Pounds. Journey to Jerusalem.
(Jericho.) ^C Luke XIX. 1-28. ^c 1 And he entered and was passing through Jericho. [This was about one week before the crucifixion. Jericho is about seven miles from the Jordan and about seventeen and a half from Jerusalem.] 2 And behold, a man called by name Zacchaeus; and he was a chief publican, and he was rich. [See p. 76. It is probable that Zacchæus was a sub-contractor under some Roman knight who had bought the privilege of collecting taxes at Jericho, or perhaps the privilege of all …
J. W. McGarvey—The Four-Fold Gospel

The Development of the Earlier Old Testament Laws
[Sidenote: First the principle, and then the detailed laws] If the canon of the New Testament had remained open as long as did that of the Old, there is little doubt that it also would have contained many laws, legal precedents, and ecclesiastical histories. From the writings of the Church Fathers and the records of the Catholic Church it is possible to conjecture what these in general would have been. The early history of Christianity illustrates the universal fact that the broad principles are …
Charles Foster Kent—The Origin & Permanent Value of the Old Testament

The Blessing of Jacob Upon Judah. (Gen. Xlix. 8-10. )
Ver. 8. "Judah, thou, thy brethren shall praise thee; thy hand shall be on the neck of thine enemies; before thee shall bow down the sons of thy father. Ver. 9. A lion's whelp is Judah; from the prey, my son, thou goest up; he stoopeth down, he coucheth as a lion, and as a full-grown lion, who shall rouse him up? Ver. 10. The sceptre shall not depart from Judah, nor lawgiver from between his feet, until Shiloh come, and unto Him the people shall adhere." Thus does dying Jacob, in announcing …
Ernst Wilhelm Hengstenberg—Christology of the Old Testament