Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/25/15

उपस्कृतं पुरा यैस्तु तेभ्यो दुःखं हितं न हि ।। यदा च दीयते दुःखं तदा नाशो भवेदिह ।। १५ ।।

sanskrit

According misery to the people who had rendered help before is not beneficial. If it is carried out, ruin will surely follow.

english translation

upaskRtaM purA yaistu tebhyo duHkhaM hitaM na hi || yadA ca dIyate duHkhaM tadA nAzo bhavediha || 15 ||

hk transliteration by Sanscript