1. Sappa Sutta.– Once, when the Buddha was staying at the Kalandaka-nivāpa in Veḷuvana, Māra appeared before him in the shape of a monstrous cobra and tried to frighten him. However, the Buddha, recognising him, said that Buddhas knew no fear. S.i.106 f.
2. Paṭhama Sappa Sutta.– The five disadvantages in a black snake, and the same disadvantages in a woman — they are unclean (asuci), evil-smelling (duggandho), timid (sabhīru), fearful (sappaṭibhayo), and betray friends (mittadubbhī). A.iii.260.
3. Dutiya Sappa Sutta.– Same as (2), the qualities being anger (kodhano), ill-will (upanāhī), spite (ghoraviso), a forked tongue (dujjivho), and betraying friends (mittadubbhī). A.iii.260.