הלכה אויף שמות 6:1

The four Pentateuchal sections, beginning respectively, "Sanctify unto me" (Ex. 13:1-10), "And it shall be when the Lord shall bring thee" (Exodus 13:11-16)—these two being in the Book of Exodus, "Hear, O Israel" (Deuteronomy 6:4-9) "And it shall come to pass if ye shall hearken diligently" (Deuteronomy 11:13-21), are written and covered with a skin. These are called Tephillin, and are placed upon the head and bound on the arm. The omission of the point of a single letter in any one of these sections bars, according to Scriptural enactment, the use of all of them. They must all be written perfectly and in accordance with rule.

V-Eleh Shmot: Jeremiah 1:1–2:3. Some conclude with Ezekiel 16:1–14. Some conclude with Isaiah 27:5–16.