Phaladeepika
बलेन सर्वं शशिनस्तु वाच्यं पूर्वे दशाहे फलमत्र मध्यम् । मध्ये दशहे परिपूर्णवीर्यं तृतीयेभागेऽल्पफलं क्रमेण ॥ ८॥
Everything ought to be declared after examination of the Moon's strength. In the first period of ten days of the lunar month, the Moon is of moderate strength. During the middle period of ten days, his strength is full, and he is therefore very auspicious. During the third period of ten days, his strength is on the wane and the effect also will be gradually de clining.
english translation
balena sarvaM zazinastu vAcyaM pUrve dazAhe phalamatra madhyam । madhye dazahe paripUrNavIryaM tRtIyebhAge'lpaphalaM krameNa ॥ 8॥
hk transliteration by Sanscript