maitryādiṣu balāni [YS 3.23]

maitrī karuṇā muditeti tisro bhāvanās tatra bhūteṣu sukhiteṣu maitrīṃ bhāvayitvā maitrībalaṃ labhate. duḥkhiteṣu karuṇāṃ bhāvayitvā karuṇābalaṃ labhate. puṇyaśīleṣu muditāṃ bhāvayitvā muditābalaṃ labhate. bhāvanātaḥ samādhir yaḥ sa saṃyamas tato balāny avandhyavīryāṇi jāyante. pāpaśīleṣūpekṣā na tu bhāvanā. tataś ca tasyāṃ nāsti samādhir ity ato na balam upekṣātas tatra saṃyamābhāvād iti.