To see whether one is reborn as a beast; if the top of the head begins to become cold and finally the knees do, but the parts lower than the knees remain warm until one's life ends, one will be reborn as a beast.
験生畜生、もし頂より冷えて膝に至り、膝下猶温にして而して後気尽くる者は即ち蓄趣の中に生ず