Mahabharata 12.167.23

12.167.23

eṣa dharmabhṛtāṃ śreṣṭha proktaḥ pāpo mayā tava |
mitradrohī kṛtaghno vai kiṃ bhūyaḥ śrotumicchasi || 23 ||

A heavy curse was denounced upon him by the gods to the effect that having begotten, within a few years, upon the body of his remarried wife many children that ungrateful sinner should sink into a terrible hell for many years. All this, O Bharata, was recited to me formerly by Narada. Recollecting the incidents of this grave story, O bull of Bharata's race, I have recited to thee all its details duly. Whence can an ungrateful person derive fame? Where is his place? Whence can he have happiness? An ungrateful person does not deserve to be trusted. One that is ungrateful can never escape. No person should injure a friend. He that injures a friend sinks into terrible and everlasting hell. Every one should be grateful and every one should seek to benefit his friends. Everything may be obtained from a friend. Honours may be obtained from friends. In consequence of friends one may enjoy various objects of enjoyment. Through the exertions of friends, one may escape from various kinds of danger and distress. He that is wise would honour his friend with his best attentions. An ungrateful, shameless, and sinful wight should be shunned by those that are wise. One that injures his friends is a wretch of his race. Such a sinful wight is the vilest of men. I have thus told thee, O foremost of all virtuous men, what the characteristics are of that sinful wretch who is stained by ingratitude and who injures his friend. What else dost thou wish to hear?'