मनु स्मृति - विवादं

ॠत्विक्पुरोहिताचार्यैर्मातुलातिथिसंश्रितैः
    बालवृद्धातुरैर्वैद्यैर्ज्ञातिसंबंधिबांधवैः ।
मातापितृभ्यां जामीभिर्भ्रात्रा पुत्रेण भार्यया
    दुहित्रा दासवर्गेण विवादं न समाचरेत् ॥

- मनु स्मृति

Rutvik purohita AchAryaiH mAtula atithi samshritaiH
    bAla vRuddha AturaiH vaidyaiH GYAtisaMbaMdhibAndhavaiH ।
mAtA pitRubhyAm jAmIbhiH bhrAtrA putreNa bhAryayA
    duhitrA dAsavargeNa vivAdam na samAcharet ॥

- manu smRuti

One must never have a harsh argument with the following - a priest, a brahmin, teacher, uncle, guest, those whom you have given refuge, children, old people, patients , doctors, relatives of your father, son-in-law, relatives of mother, mother, father, sister, daughter-in-law, brother, son, wife, daughter and servants.

- Manu Smriti