Why did the Torah write "Ki es Kol ha'To'evos ha'Eil" (See Torah Temimah, mote 125) - in Acharei-Mos Vayikra, 18:27, in connection with Arayos and "Kol Asei Eileh" here, in connection with weights and measures?
Bava Basra, 88b: To teach us that the sin of weights and measures is worse than that of Arayos - because, whereas it is possible to do Teshuvah on the latter, it is not possible to do Teshuvah on the former. 1
See Torah Temimah, note 196.
Bearing in mind the previous answer, why in connection with Arayos - in Acharei-Mos Vayikra, 18:29 did the Torah also write "Ki Kol Asher Ya'aseh mi'Kol ha'To'evos ha'Eileh Ve'nichr'su"?
Bava Basra, 88b: In order to exempt Midos (false weights and measures) from Kareis. 1
See Torah Temimah, note 197.
Why did the Torah write "Kol Oseh Eileh" and not 'Oseh Kol Eileh';?
Sifri: To teach us even if one transgresses just one of the listed sins, it is a To'evah in the Eyes of Hashem. 1
See Torah Temimah, note 198.
Having said "Kol Osei Eileh", why does the Torah add "Kol Osei Avel"?
Targum Yonasan: To incorporate people who indulge in dishonest business practices, whom Hakadosh-Baruch-Hu also detests.
Sifri: To incorporate mixing in different kinds of fruit, even fresh fruit together with old fruit. 1
See Torah Temimah, citing the Sifri and note 199.
What is the meaning of the word "Avel"?
Targum Onkelos and Targum Yonasan: It means falsehood (in business dealings - Targum Yonasan).