Muslim bin Ata (may Allah have mercy on him) narrates that a man made a bequest for his relatives, but the relatives considered it little, so they said: "Increase their share." I said: "I cannot increase their share." Then they said: "Ask Hasan Basri (may Allah have mercy on him)." When he was asked, he said: "What he has specified is sufficient."
Hadith Referenceسنن سعید بن منصور / كتاب ولاية العصبة / 1536