This Pasuk is referring to Ona'as Devarim. What is the definition of Ona'as Devarim?
Rashi and Seforno: It incorporates verbal abuse 1 (Geneivas Da'as 2 - Seforno) and giving advice that is not to the advantage of the recipient.
Targum Yonasan: It means 'verbal abuse' (harsh words).
Moshav Zekenim: Refer to 25:14:3:2.
Bava Metzi'a, 48b: Such as saying to a Ba'al Teshuvah 'Remember when you used to sin!' or to a Ger who comes to learn Torah 'How can a mouth which ate Neveilos and T'reifos learn Torah? Refer also to 25:14:3:2, and see Torah Temimah, note 105.
Seforno: Even if it has no connection with monetary issues.'
Why does the Torah write "Al Tonu Ish es Amiso" and not 'es Achiv'?
Bava Metzi'a, 59a: In order to Darshen "Am she'Itcha be'Torah u've'Mitzvos" ? 'someone who is with you in Torah and Mitzvos - to preclude someone who does not observe Torah and Mitzvos - on whom Ona'as Devarim is permitted. 1
As if "Amischa" was spelt with an 'Alef'. See Torah Temimah, note 106.
Why does the Torah insert "Veyareisa me'Elokecha"?
Rashi: Refer to 25:17:2:1. To remind the person giving advice that, even though the advice he is giving appears genuine on the surface, Hashem knows what is in his heart, 1
Rashi: As the Torah does wherever it discusses things that are to do with the heart (the mind) of the person.
Why does the Torah add the phrase "Ki Ani Hashem Elokeichem"?
Seforno: Hashem is saying that He is the G-d of both the buyer and the seller, and He is particular about either one cheating the other'.
