Brihat Parashara Hora Shastra
सप्रदायस्य सिध्हिः स्यात् गुरुसम्बन्धतो द्विज । स्वांशाद् द्वितीयतः केचित् फलमेवं वदन्ति हि ॥ ४५॥
Should Guru be related to the positions of Karakāńś, or the 5th from there, while the Karakāńś is caused by others than him, the effects, as stated, will effectively come to pass. Some say, that the 2nd from Karakāńś should also be similarly considered.
english translation
sapradAyasya sidhhiH syAt gurusambandhato dvija । svAMzAd dvitIyataH kecit phalamevaM vadanti hi ॥ 45॥
hk transliteration by Sanscript