Verse 1 — Judging Siblings via 3rd House and Mars
भ्रातृभावं तु जानीयाद् भ्रातृनाथाच्च कारकात् । कुजेन सहिताः खेटा भ्रातृवृद्धिकरा मताः ॥ १ ॥
bhrātṛbhāvaṃ tu jānīyād bhrātṛnāthācca kārakāt | kujena sahitāḥ kheṭā bhrātṛvṛddhikarā matāḥ || 1 ||
The existence and welfare of brothers and sisters must be evaluated through the 3rd house, the 3rd lord, and natural significator Mars (Kuja). Benefics with Mars increase siblings.