Muhammad bin Abi Bakr bin Hazm (may Allah have mercy on him) narrates from his father that the Prophet (peace and blessings be upon him) said: "There is to be no splitting up (ta'diyah) of the estate for the heirs, except what the division can bear." He means: it is not to be broken into pieces to the detriment of the heir.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب آداب القاضي / 20446