增壹阿含經 13.7.p2

13.7.p2

Venerable Subhūti then experienced physical pain that became a serious burden, and he thought, “What is producing these painful feelings of mine? What would cease them? Where would they go?” Venerable Subhūti then prepared a seat out in the open. He sat there cross-legged with upright body, proper mindfulness, and focused mind. He contemplated the senses in order to impede his painful feelings.