Halakhah sa Deuteronomio 11:14: Mishneh Torah, Torah Study & Mishneh Torah, Tefillin, Mezuzah and the Torah Scroll

Every man in Israel is obliged to study the Torah, whether he be poor or rich, whether he be physically healthy or ailing, whether he be in full vigor of youth or of great age and weakened vitality; even if he be dependent upon alms for his livelihood, or going around from door to door begging his daily bread, yea, even he who has a wife and children to support is obliged to have an appointed time for the study of the Torah, both during the day and at night, for it is said: "But thou shalt meditate therein day and night" (Joshua, 1.8.).⁹Yoma, 35a; Menahot, 99b. G. G.

In the first section, there is only one such letter, namely the closed Mem in Meeyamim which has over it three Zain-shaped lines. In the second section, there are five letters, each of them a Hé; and on each, there are four zain-shaped lines. These are the Hé in Unesanah; the first and the last Hé in Hikshah; the Hé in Vayaharog; the Hé in Yadchah. The third section has five such letters. The Koof in Uvekoomecha has over it three zain-shaped lines; the Koof in Ukeshartam has over it three zain-shaped lines; the two letters Teth, and the letter Pé in Letotaphoth have on each of them four zain-shaped lines. The fourth section has five such letters. The Pé of Veasaphta has above it three zain-shaped lines. The Tav of Veasaphta has one zain-shaped line. The two letters Teth and the letter Pé in Letotaphoth have on each of them four zain-shaped lines. Altogether, the letters thus ornamented are sixteen. If the scribe wholly omitted these ornaments, added to them or omitted them over some of the letters, he has not rendered the phylacteries unfit for use.

In the first section, there are seven letters, each of which should have above it three upright lines in the shape of the letter Zain. They are the Shin and Ayin in Shema; Nun in Nafshecha; the two Zain in Mezuzoth; the two Teth in Totafoth. The second section has six letters, each of which should have above it three Zain-shaped lines. They are the Gimel in Degancha; the two Zain in Mezuzoth; the two Teth in Totafoth; the Tzadi in Ha-aretz. If the tittles were omitted or if they are more or less than those specified, the Mezuzah has not been rendered unfit for use. But if it was written without the lines having been ruled, or if the scribe paid no heed to plene or defective letters, or if he added in the text even a single letter, the Mezuzah is unfit for use.