Brihat Parashara Hora Shastra
पूर्णं च सप्तमं सर्वे शानिजीवकुजाः पुनः । विशेषतश्च त्रिदशत्रिकोणचतुरष्टमान् ॥ ४॥
The effects will also be proportionate. All Grahas give a Drishti to the 7th fully. Śani, Guru and Mangal have special Drishtis, respectively, on the 3rd and the 10th, the 5 th and the 9th and the 4th and the 8th.
english translation
pUrNaM ca saptamaM sarve zAnijIvakujAH punaH । vizeSatazca tridazatrikoNacaturaSTamAn ॥ 4॥
hk transliteration by Sanscript