Jataka Tattva 6.17

लग्नाम्बुधर्मेशास्त्रिकोणकेन्द्रगाः पिता मात्रा सहैव म्रियते ।

Take the lords of the lagna (rising sign), the 4th and the 9th houses. Say they are in a trikona (luck house) or a kendra (corner house). Then the…

रात्रौ चन्द्रात् त्रिकोणे मन्दे मातृवधः ।

Say the person is born at night. Saturn is in a trikona (luck house) from the Moon. Then the mother dies.

सुखे शुभे कारके शुभयुते बलाढ्ये वा सुखे मातुर्दीर्घायुः ।

Say a good planet is in the 4th house. The karaka (the planet that stands for a thing) [for the mother] is joined by good planets. Or say the 4th…