The Gemara read the word , "reshef" ("fiery bolt") in to refer to demons, and the Gemara employed that interpretation with others to support Rabbi Isaac's assertion that reciting the Shema in bed keeps demons away. Rabbi Shimon ben Lakish reasoned from that Torah study keeps away painful sufferings. For says, "And the sons of , "reshef", fly upward (, "uf")." He argued that the word , "uf", refers only to the Torah, as says, "Will you close (, "hataif") your eyes to it (the Torah)? It is gone." And , "reshef", refers only to painful sufferings, as says, "The wasting of hunger, and the devouring of the fiery bolt (, "reshef"). Rabbi Joḥanan said to Rabbi Shimon ben Lakish that even school children know that the Torah protects against painful disease. For says, "And He said: 'If you will diligently hearken to the voice of the Lord your God, and will do that which is right in His eyes, and will give ear to His commandments, and keep all His statutes, I will put none of the diseases upon you that I have put upon the Egyptians; for I am the Lord Who heals you." Rather one should say that God visits those who have the opportunity to study the Torah and do not do so with ugly and painful sufferings which stir them up. For says, "I was dumb with silence, I kept silence from the good thing, and my pain was stirred up." "The good thing" refers only to the Torah, as says, "For I give you good doctrine; forsake not My teaching."