Brihat Samhita
उल्का पक्षेण फलं तद्वद्धिष्ण्याअशनिस्त्रिभिः पक्षैः । विद्युदहोभिः षड्भिः तद्वत्तारा विपाचयति ॥ ३३-०२ ॥
Dhiṣṇya produces its effects within a fortnight; Ulkā takes also the same period; Aśani produces its effects within a month and a half; Vidyut within 6 days and Tārā takes the same period.
english translation
ulkA pakSeNa phalaM tadvaddhiSNyAazanistribhiH pakSaiH । vidyudahobhiH SaDbhiH tadvattArA vipAcayati ॥ 33-02 ॥
hk transliteration by Sanscript