Yoga Sūtra Chapter Three verse 23
मैत्र्यदिषु बलानि ॥२३॥
maitrī-ādiṣu balāni ||23||
Friendliness and the rest, strengths.
maitrī - friendliness, good willādi - in the beginning, at first; beginning, commencement; a firstling, first-fruits; beginning with, and so on; and the restbala - strength, might, force; force or power of articulation