[981] Sū’ includes, as in this instance, all sins both major and minor. It is called sū’ (lit. ill/bad/unpleasant) because it is a bad deed which rebounds back on the committer with a punishment that he will not be pleased with. (al-Saʿdī, Ibn ʿĀshūr)
[982] By earning what he deserves God’s Punishment for, such as sinning and Associating with God. (al-Ṭabarī, al-Saʿdī)