Hayanaratna · by Balabhadra
Chapter 6 · The Twelve Houses
द्वादशभावविचाराध्यायः
वामनः ॥पुण्यसद्मनि पुत्रस्थे पुत्राप्तिः शुभवीक्षिते ॥लग्नपुत्रेश्वरौ पुत्रे शुक्रश्चंद्रोथवा गुरुः॥
The house of merit may stand in the 5th, with good planets looking at it. Then a son is gained. So too when the lagna (rising sign) lord and the 5th lord stand in the 5th, or Venus, the Moon or Jupiter.
Simple meaning: House of merit in the 5th, seen by good planets: a son is gained. So too with the lagna and 5th lords, or Venus, Moon or Jupiter, in the 5th.
पुत्रदः पुत्रभवनं यदुच्चं सद्ग्रहो यदि ॥
The 5th is a good planet's high-point sign, and that planet goes there: a son comes quickly.
पुत्रसद्मेश्वरे नष्टे पुत्रनाशं समादिशेत् ॥
5th lord lost: a son may be lost. 5th lord risen in the 5th: a son is gained.
वर्षतन्त्रे ॥
Same verse as Tajika Nilakanthi 13.4; see its meaning there.