That foolish man who chews a toothbrush on the day of the new moon is considered as on injuring the god of the moon by such a deed. The departed Manes of such a person become annoyed with him.
दन्तकाष्ठं तु यः खादेदमावास्यामबुद्धिमान्। हिंसितश्चन्द्रमास्तेन पितरचोद्विजन्ति च॥