Kamma Obstructions
Kammāvaraṇatā Sutta  (AN 6:87)

“Endowed with these six qualities, a person is incapable of alighting on the lawfulness, the rightness of skillful qualities even when listening to the true Dhamma. Which six?

“He has killed his mother; he has killed his father; he has killed an arahant; he has, with corrupt intent, caused the blood of a Tathāgata to flow; he has caused a split in the Saṅgha [see AN 5:129]; or he is a person of dull discernment, slow & dull-witted.

“Endowed with these six qualities, a person is incapable of alighting on the lawfulness, the rightness of skillful qualities even when listening to the true Dhamma.

“Endowed with these six qualities, a person is capable of alighting on the lawfulness, the rightness of skillful qualities even while listening to the true Dhamma. Which six?

“He has not killed his mother; he has not killed his father; he has not killed an arahant; he has not, with corrupt intent, caused the blood of a Tathāgata to flow; he has not caused a split in the Saṅgha; and he is a discerning person, not slow or dull-witted.

“Endowed with these six qualities, a person is capable of alighting on the lawfulness, the rightness of skillful qualities even while listening to the true Dhamma.”

See also: DN 2; AN 5:129; AN 5:202