Bedtime Shema

(14) (Fol. 5a) R. Levi b. Chama, in the name of Simon b. Lakish said: "At all times let man stir up his good inclination against the evil inclination), for it is said (Ps. 4, 5.) Tremble, and sin not. If he conquers it (the evil inclination) it is well, but if he does not, then he should study the Torah ; for we read, (Ib.) Commune with your heart. If it goes away, then it is well, but if not he should then read the Sh'm'a; for it is said (Ib.) Upon your bed. If he conquers it, then it is well, but if not, he should then remind himself of the day of death, for it is written. And be still Selah (to the end)." R. Isaac said : "Whoever reads the Sh'm'a when on his bed is considered [protected] as if he were holding a two-edged sword in his hand, for it is written (Ps. 149, 6.) The exalted praises (of God) are in their mouths and the two-edged sword in their hands." How does he infer this? Mar Zutra and according to others, R. Ashi, said : "From the beginning of that passage (Ib. ib. 5.) Let the pious be joyful in glory; let them, sing aloud upon their beds; and it is written after this The exalted praise of God is in their mouths and a two-edged sword in their hands." Furthermore, said R. Isaac: Whoever reads the Sh'm'a on his bed [before sleep], will cause the departure of all evil spirits; for it is said (Job 5, 7.) And the sons of fire take up their flight. By Uf (flight) is meant nothing else but the Torah, as it is said (Pr. 23, 5.) When thou letteth merely thine eyes fly over it (i. e., if thou learneth the Torah superficially), it is no more. And reshef (fire) means nothing else but evil spirits; as it is said (Deu. 32, 24.) Devoured with burning heat and with bitter deadly disease."