Midrash su Proverbi 28:9

(Fol. 10a) Raba b. R. Huna was wont to put on fine gaiters for prayer, saying: It is written (Amos 4, 12.) Prepare thyself to meet thy God, O Israel. Raba was accustomed to throw off his mantle and fold his hands when praying, saying: "Like a servant before his master [should a man stand]." R. Ashi said: "I have noticed that R. Cahana in time of trouble was accustomed to throw off his mantle and fold his hands while praying, saying: 'Like a servant before his master [should a man stand],' and in time of peace he clothed, covered and wrapped himself up and then prayed, saying: 'Prepare thyself to meet thy God, O Israel.'" (Ib.) Raba observing that R. Hamnuna was prolonging his prayer, said: "They leave eternal life (Torah) and occupy themselves with transient life (prayer)." But R. Hamnuna contends that a separate time is provided for prayer and a separate time for study. R. Jeremiah was sitting before R. Zeira discussing traditional law, [and as] it was becoming late for prayer, R. Jeremiah hurried [his teacher], whereupon R. Zeira read to him the passage (Pr. 28, 9.) When one turneth away his ear so as not to listen to the Torah, even his prayer becometh an abomination.

(Cain) brought the remnants of his meal of roasted grain, (and) the seed of flax, and Abel brought of the firstlings of his sheep, and of their fat, he-lambs, which had not been shorn of their wool. The offering of || Cain was precluded, and the offering of Abel was acceptable, as it is said, "And the Lord had respect unto Abel and to his offering" (Gen. 4:4).