पितृद्रव्यादविभक्तोपगतानां पुत्राः पौत्रा वा आचतुर्थादित्यंशभाजः ॥ कZ_०३.५.०४ ॥
pitṛdravyād avibhaktopagatānāṃ putrāḥ pautrā vā ācaturthād ity aṃśabhājaḥ
Sons—or grandsons—who have remained in an undivided joint estate derived from the father’s property become entitled to shares beginning from the fourth generation (i.e., the right of share is recognized up to the third; beyond that, share-claims start only from the fourth).
It reduces litigation by narrowing who can assert a legal share in ancestral property, making succession determinate and easier for courts/officials to enforce.