cellio | daf bit: Ketubot 52

Today's daf teaches some laws about a husband's obligations that apply even if he did not write them in the ketubah for his wife: their sons inherit the amount of her ketubah in addition to their other inheritance; he must maintain their daughters in his house until they are married; and should he die first, his wife may stay in his house and be maintained out of his estate for as long as she remains a widow. (I take it that this means that, should she remarry, this arrangement ends -- which makes sense.) That is all in the mishna; in the g'mara we learn that he is required to provide a dowry for his daughters so that men will be anxious to woo them. How much? Up to a tenth of his wealth. (52b)

(I don't know what the "up to" depends on or if there's a minimum.)