Five impossibilities, to wit, for an arahant intentionally to take life, or to take what is not given, so as to amount to theft, or to commit sexual offense, or to lie deliberately, or to spend stored-up treasure in worldly enjoyments, as in the days before he left the world. MN - I.523
. . . the arhant monk . . . cannot transgress nine standards: a monk in whom the cankers are destroyed, cannot deliberately take life of any living thing; cannot, with intention steal, take that which is not given; cannot engage in carnal intercourse; cannot intentionally tell a lie; cannot enjoy pleasures from savings, as of yore when a householder; . . . cannot go astray through desire, cannot go astray through hate; cannot go astray through delusion; cannot go astray through fear. AN IV.370.