Verse 88

ततःप्रभृति संप्राप्तपदमुद्दालको द्विजः ।गुहासु गिरिकुक्षीणामवसद्ध्यानलीलया

In plain words

From that time on, that twice-born Uddālaka, having attained that station, dwelt in the caves within the flanks of mountains, at play in dhyāna.