Brihat Parashara Hora Shastra
अस्तंगता ग्रहजिता नीचगा दुर्बलाश्च ये। शयनादिगतास्तेभ्य उत्पन्ना योगनाशकाः॥ ५३॥
The divisions of a combust Grah, defeated Grah, weak Grah and a Grah in bad Avasthas, like Sayan, be all ignored to be auspicious, for these destroy the good Yogas.
english translation
astaMgatA grahajitA nIcagA durbalAzca ye। zayanAdigatAstebhya utpannA yoganAzakAH॥ 53॥
hk transliteration by Sanscript