Phaladeepika
शस्तगृहे शस्तांशे नीचे रिपुभेऽस्तसंस्थिते वाऽपि । तस्य दशा मिश्रफला दशापरार्धे फलप्रदा ज्ञेया ॥ ५७॥
When a planet even if eclipsed or posited in its depression or inimical house occupies an auspicious sign or Amsa , his Dasa should be pronounced as of mixed effect Misra phala and is capable of giving good effect in the latter half of the Dasa.
english translation
zastagRhe zastAMze nIce ripubhe'stasaMsthite vA'pi । tasya dazA mizraphalA dazAparArdhe phalapradA jJeyA ॥ 57॥
hk transliteration by Sanscript