When the third house is afflicted by Mars and Mercury, Bhratri Dosha arises therein; faith and devotion toward one's siblings is then especially required.
Verse 3 — Sibling Seva as the Supreme Remedy
भ्रातृसेवा समं नान्यच्छान्तिमेति कदाचन । दानं मङ्गलपूजा च भ्रातृदोषविनाशनम् ॥
bhrātṛsevā samaṁ nānyac chāntim eti kadācana | dānaṁ maṅgalapūjā ca bhrātṛdoṣavināśanam ||
Nothing else ever bestows peace equal to the service of one's siblings; charity and the worship of Mars together destroy the Bhratri Dosha.