Mbh 13.47.2b

Even this should be the order of the ten shares into which the Brahmana's wealth is to be divided. All the sons that are born of the same mother or of mothers of the same order, shall share equally the portion that is theirs. The son born of the Sudra wife should not be regarded as invested with the status of a Brahmana in consequence of his being unskilled (in the scriptures and the duties ordained for the Brahmana). Only those children that are born of wives belonging to the three higher orders should be regarded as invested with the status of Brahmanas. It has been said that there are only four orders, there is no fifth that has been enumerated. The son by the Sudra wife shall take the tenth part of his sire's wealth (that remains after the allotment has been made to the others in the way spoken of). That share, however, he is to take only when his sire has given it to him. He shall not take it if his sire does not give it unto him. Some portion of the sire's wealth should without doubt, be given, O Bharata, to the son of the Sudra wife. Compassion is one of the highest virtues. It is through compassion that something is given to the son of the Sudra wife. Whatever be the object in respect of which compassion arises, as a cardinal virtue it is always productive of merit. Whether the sire happens to have children (by his spouses belonging to the other orders) or to have no children (by such spouses), unto the son by the Sudra wife, O Bharata, nothing more than a tenth part of the sire's wealth should be given. If a Brahmana happens to have more wealth than what is necessary for maintaining himself and his family for three years, he should with that wealth perform sacrifices. A Brahmana should never acquire wealth for nothing.[295] The highest sum that the husband should give unto the wife is three thousand coins (of the prevailing currency). The wealth that the husband gives unto the wife, the latter may spend or dispose of as she likes.