KAṬHA UPANISHAD · 1.2.24

नाविरतो दुश्चरितान्नाशान्तो नासमाहितः ।
नाशान्तमानसो वाऽपि प्रज्ञानेनैनमाप्नुयात् ॥ २४॥

nāvirato duścaritānnāśānto nāsamāhitaḥ ।
nāśāntamānaso vā’pi prajñānenainamāpnuyāt ॥ 24॥

None who has not ceased from doing evil, or who is not calm, or not concentrated in his being, or whose mind has not been tranquillised, can by wisdom attain to Him.