Brihat Jataka
क्रूरग्रहै: सुबलिभिर्विबलैश्च सोम्यै: क्लीबे चतुष्टयगते तदवेक्षणाद्वा ॥ चन्द्रोपगद्विरसभागसमनरूपं सत्त्वं वदेद्यदि भवेत्स वियोनिसंज्ञ: ॥ ३-१ ॥
If in the birth chart, the malefic planets are very strong and the benefics are very weâk and the impotent planets ie Saturn and Mercury occupy the kendra position or these impotent planets aspect Moon or the lagna, it should be declared as a non-human birth provided in addition the Moon occupies a dwadashamsha denoting a non-human being, the species of the non-human being should be determined from the form of the dwadashamsha sign involved (Aries for ram, Taurus for ox, Leo for lion etc).
english translation
krUragrahai: subalibhirvibalaizca somyai: klIbe catuSTayagate tadavekSaNAdvA ॥ candropagadvirasabhAgasamanarUpaM sattvaM vadedyadi bhavetsa viyonisaMjJa: ॥ 3-1 ॥
hk transliteration by Sanscript