Brihat Parashara Hora Shastra
दारेशे नीचराशिस्थे शुक्रे रन्ध्रारिसंयुते । अष्टादशे त्रयस्त्रिंशे वत्सरे दारनाशनम् ॥ ३५॥
TIMING OF WIFE‟S DEATH. Loss of wife will occur in the 18th year, or 33rd year of age of the native, if Yuvati Lord is in fall, while Śukr is in Randhr.
english translation
dAreze nIcarAzisthe zukre randhrArisaMyute । aSTAdaze trayastriMze vatsare dAranAzanam ॥ 35॥
hk transliteration by Sanscript