Mahabharata 12.151.27

तस्माद्वैरं न कुर्वीत दुर्बलो बलवत्तरैःशोचेद्धि वैरं कुर्वाणो यथा वै शल्मलिस्तथा

tasmādvairaṃ na kurvīta durbalo balavattaraiḥśoceddhi vairaṃ kurvāṇo yathā vai śalmalistathā

Our plain-language meaning of this verse is waiting for scholar review.