נָשָׂאתָ וְנָתַתָּ בָּאֱמוּנָה?

With regard to the same verse, Rava said: After departing from this world, when a person is brought to judgment for the life he lived in this world, they say to him in the order of that verse: Did you conduct business faithfully? Did you designate times for Torah study? Did you engage in procreation? Did you await salvation? Did you engage in the dialectics of wisdom or understand one matter from another? And, nevertheless, beyond all these, if the fear of the Lord is his treasure, yes, he is worthy, and if not, no, none of these accomplishments have any value. There is a parable that illustrates this. A person who said to his emissary: Bring a kor of wheat up to the attic for me to store there. The messenger went and brought it up for him. He said to the emissary: Did you mix a kav of ḥomton, a preservative to keep away worms, into it for me? He said to him: No. He said to him: If so, it would have been preferable had you not brought it up. Of what use is worm-infested wheat? Likewise, Torah and mitzvot without the fear of God are of no value.

You should be extremely careful not to deceive your fellow man. If anyone deceives his fellow, whether a seller deceives a buyer, or a buyer deceives a seller, he transgresses a negative commandment, for it is said: "When you sell something to your neighbor, or buy from your neighbor, do not deceive one another." The first question a person is asked when he is brought before the [Heavenly] Court is: "Have you [always] been honest in your dealings?"

Rabbi Yehuda HaNasi continued: And do not avoid paying taxes, lest they find you and confiscate everything you own. And do not stand before an ox when it emerges from the marsh because Satan dances between its horns, i.e., an ox is particularly menacing at that time. Rabbi Shmuel said: This is referring to a black ox, and specifically during the days of Nisan, when the ox is most dangerous.