Brihat Parashara Hora Shastra
स्वोच्चस्वभस्थराज्येशो लग्नं पश्यंश्च राज्यदः । शुभाः केन्द्रस्थिता वाऽपि राज्यदः नाऽत्र संशयः ॥ २१॥
If Karm‟s Lord, placed in his own Bhava, or in its exaltation Rāśi, gives a Drishti to Lagn, a Raj Yog is formed. Similar is the case, if benefics are in Kendras.
english translation
svoccasvabhastharAjyezo lagnaM pazyaMzca rAjyadaH । zubhAH kendrasthitA vA'pi rAjyadaH nA'tra saMzayaH ॥ 21॥
hk transliteration by Sanscript