Brihat Parashara Hora Shastra
अंकाग्नयोऽङ्गरामाश्च खाग्नया करसिन्धवः । नवाग्नयः सुरास्त्रिंशद् दशसंगुणिताः क्रमात् ॥ ३२॥
Shad Bal Requirements. 390, 360, 300, 420, 390, 330 and 300 Virupas are the Shad Bal Pindas, needed for Sūrya etc. to be considered strong. If the strength exceeds the above-mentioned values, the Grah is deemed to be very strong.
english translation
aMkAgnayo'GgarAmAzca khAgnayA karasindhavaH । navAgnayaH surAstriMzad dazasaMguNitAH kramAt ॥ 32॥
hk transliteration by Sanscript