增壹阿含經 24.5.p167

24.5.p167

How did he teach them with miraculous abilities? The Bhagavān sometimes divided into any number of forms and then combined them into one again. Sometimes, he disappeared and reappeared. Sometimes, he passed through stone walls without being obstructed at all. Sometimes, he entered the earth as though it were a flowing river without being blocked by it. Sometimes, he sat cross-legged and went up into the sky like a bird flying without being obstructed at all. He also could be like a giant volcano that produces smoke without measure. His great miraculous power wasn’t limited even by the sun and moon, which he could touch with his hand. He could go physically up to the Brahma heaven. Thus, the Bhagavān demonstrated miraculous abilities.