Samyuktagama (Sanskrit fragments) 197.5

197.5

神足示現者，世尊隨其所應，而示現入禪定正受，陵虛至東方，作四威儀，行、住、坐、臥，入火三昧，出種種火光，青、黃、赤、白、紅、頗梨色，水火俱現、或身下出火，身上出水，身上出火，身下出水，周圓四方亦復如是。爾時，世尊作種種神變已，於眾中坐，是名神足示現。

When demonstrating his miraculous abilities, the Bhagavān demonstrated entry into the attainment of dhyāna samādhi when it was appropriate. He then rose up into the sky and went east. He assumed the four postures, which are walking, standing, sitting, and lying down, and entered the samādhi of fire. He emitted a variety of fiery lights that were blue, yellow, red, white, purple, and crystal. He produced both water and fire. Either fire would come out below his body and water would come out above it, or fire would come out above his body and water would come out below it. He would do this while circling around in all four directions. Then, once he had demonstrated this variety of miracles, he would sit among the assembly. This was called the demonstration of miraculous abilities.