Jerome

For out of the heart come evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies: these are the things that defile a person. But to eat with unwashed hands does not defile a person. 'For out of the heart,' he says, 'come evil thoughts.' Therefore, according to Christ and not according to Plato, the soul's principal place is in the heart, not in the brain. …

Commentary on Matthew ↗

Thomas Aquinas

Likewise he lists sins which are against the precepts of the second table: murders, adulteries, fornications, thefts. Likewise, sins of the mouth against one's neighbor: false testimonies; blasphemies, against the precepts of the first table.

Commentary on Matthew ↗

Glossa Ordinaria

And from evil thoughts proceed evil deeds and evil words, which are forbidden by the law; whence He adds Murders, which are forbidden by that commandment of the Law, Thou shalt not kill; Adulteries, fornications, which are understood to be forbidden by that precept, Thou shalt not commit adultery; Thefts, forbidden by the command, Thou shalt not steal; False witness, by that, Thou shall not bear false witness against thy neighbour; Blasphemies, by that, Thou shalt not take the name of God in vain.

Catena Aurea by Aquinas ↗