KAṬHA UPANISHAD · 1.3.7

यस्त्वविज्ञानवान्भवत्यमनस्कः सदाऽशुचिः ।
न स तत्पदमाप्नोति संसारं चाधिगच्छति ॥ ७॥

yastvavijñānavānbhavatyamanaskaḥ sadā’śuciḥ ।
na sa tatpadamāpnoti saṃsāraṃ cādhigacchati ॥ 7॥

Yea, he that is without knowledge and is unmindful and is ever unclean, reaches not that goal, but wanders in the cycle of phenomena.