Yamaka-pātihāriya: 'twin miracle': There the Perfect One performed the twin miracle unattainable to any disciple: from the upper part of his body a flame sprang forth, and from the lower part a stream of water. etc. Pts.M. I, 125 f.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.