Brihat Parashara Hora Shastra
त्रिंशैकविंशे षड्विंशे जनकस्य मृतिर्भवेत् । भाग्येशे नीचराशिस्थे तदीशे भाग्यराशिगे ॥ २४॥
If Dharm‟s Lord is in its debilitation Rāśi, while his dispositor is in Dharm Bhava, the native will lose his father at the age of 26, or 30.
english translation
triMzaikaviMze SaDviMze janakasya mRtirbhavet । bhAgyeze nIcarAzisthe tadIze bhAgyarAzige ॥ 24॥
hk transliteration by Sanscript