Hayanaratna · by Balabhadra
Chapter 7 · Finding the Dashas
दशानयनाधिकाराध्यायः
लग्नस्य सबलत्वे हि भावपूर्वा तु सा मता ॥कालहोरादशा कार्या सवीर्ये द्वे च तत्पतौ ॥ २ ॥
When the lagna (rising sign) is strong, that same tasira dasha is held, with 'bhava' (house) before its name. The kalahora (planet ruling the hour) dasha (planet period) should be used when the two are strong, and its lord too.
Simple meaning: Lagna strong: use the house tasira periods. Hour lord strong: use the hour-lord periods.
हद्दाख्या वर्षलग्नस्य हद्देशे बलसंयुते ॥
Year lagna's hadda lord strong: use hadda periods. Year Moon strong: use natural periods.
सवीर्यजन्मराशीशे मुद्दा गौरीमतेन तु ॥
Birth sign lord strong: use Gauri's mudda periods. All planets equal in strength: use tasira periods.
सवीर्येचंद्रराशीशे बलरामाह्वया मता ॥
Moon sign lord strong: use Balarama's periods. No planet sees the lagna: use house periods.