KAIVALYA UPANISHAD · 2

तस्मै स होवाच पितामहश्च श्रद्धाभक्तिध्यानयोगादवैहि ॥ २॥

tasmai sa hovāca pitāmahaśca śraddhābhaktidhyānayogādavaihi ॥ 2॥

To him the Grandfather (thus) replied: “Know (It) through Śraddhā (faith), Bhakti (devotion), Dhyāna (meditation), and Yoga.

K. Narayanasvami Aiyar · Thirty Minor Upanishads (1914), pp. 31–33