Negative commandment · Lo Ta’aseh #88 of 613
For the [High Priest's] cloak not to tear
שלא ייקרע המעיל
The verse · Shemot 28:32
וְהָיָה פִי־רֹאשׁוֹ בְּתוֹכוֹ שָׂפָה יִהְיֶה לְפִיו סָבִיב מַעֲשֵׂה אֹרֵג כְּפִי תַחְרָא יִהְיֶה־לּוֹ לֹא יִקָּרֵעַ
“And there shall be a hole for the head, in the midst of it: it shall have a binding of woven work round about the hole, as it were the hole of a suit of armour, that it be not torn.”
The Rambam’s words
For the [High Priest's] cloak not to tear, as [Exodus 28:32] states: "It shall have a woven border around it. It shall not tear."
שלא ייקרע המעיל, שנאמר "כפי תחרא יהיה לו--לא ייקרע" (שמות כח,לב).
Why · Sefer HaChinuch #101
To not tear the coat of the priests
“It is from the roots of the commandment [that] because tearing is a thing of disgrace for us and a matter of destruction, we have been distanced from the thing and warned about it with a negative commandment.”
Who & when
“And [it] is practiced at the time of the [Temple] by males and females.”
Where in the Mishneh Torah
Hilchot Vessels of the Sanctuary and Those Who Serve Therein הלכות כלי המקדש והעובדין בו