[16] And which, bhikkhus, are the taints (āsava) that are to be abandoned by avoiding? Here, bhikkhus, a bhikkhu, reflecting wisely (paṭisaṅkhā yoniso), avoids a fierce elephant, avoids a fierce horse, avoids a fierce ox, avoids a fierce dog, a snake, a stump, a thorny place, a pit, a precipice, a cesspool, a sewer. Reflecting wisely, he avoids sitting on such an unsuitable seat, wandering in such an unsuitable resort, and associating with such bad friends as would lead wise companions in the holy life to suspect him of evil conduct. For, bhikkhus, whatever distressing and feverish taints might arise in one who does not avoid these things, for one who avoids them those distressing and feverish taints do not arise. These, bhikkhus, are called the taints that are to be abandoned by avoiding.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.