"Monks, the taking of life — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from the taking of life is that, when one becomes a human being, it leads to a short life span.
"Stealing — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from stealing is that, when one becomes a human being, it leads to the loss of one's wealth.
"Illicit sexual behavior — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from illicit sexual behavior is that, when one becomes a human being, it leads to rivalry & revenge.
"Telling falsehoods — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from telling falsehoods is that, when one becomes a human being, it leads to being falsely accused.
"Divisive tale-bearing — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from divisive tale-bearing is that, when one becomes a human being, it leads to the breaking of one's friendships.
"Harsh speech — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from harsh speech is that, when one becomes a human being, it leads to unappealing sounds.
"Frivolous chattering — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from frivolous chattering is that, when one becomes a human being, it leads to words that aren't worth taking to heart.
"The drinking of fermented & distilled liquors — when indulged in, developed, & pursued — is something that leads to hell, leads to rebirth as a common animal, leads to the realm of the hungry shades. The slightest of all the results coming from drinking fermented & distilled liquors is that, when one becomes a human being, it leads to mental derangement."
See also: AN 4.111 , as an example of harsh training.