SB 4.8.17

dīrghaṁ śvasantī vṛjinasya pāram
 apaśyatī bālakam āha bālā
māmaṅgalaṁ tāta pareṣu maṁsthā
 bhuṅkte jano yat para-duḥkhadas tat
Synonyms: 
dīrgham — heavy; śvasantī — breathing; vṛjinasya — of the danger; pāram — limitation; apaśyatī — without finding; bālakam — to her son; āha — said; bālā — the lady; — let there not be; amaṅgalam — ill fortune; tāta — my dear son; pareṣu — unto others; maṁsthāḥ — desire; bhuṅkte — suffered; janaḥ — person; yat — that which; para-duḥkhadaḥ — who is apt to inflict pains upon others; tat — that.
Translation: 
She also was breathing very heavily, and she did not know the factual remedy for the painful situation. Not finding any remedy, she said to her son: My dear son, don’t wish for anything inauspicious for others. Anyone who inflicts pains upon others suffers himself from that pain.