Is it permissible for two daughters to take their mother's gold that she bequeathed to them, knowing that their male siblings agree, and that the inheritance includes an apartment and a sum of money?

A will in favor of an heir is not permissible unless the mature, adult heirs approve it after the testator's death. So, if your mature, adult siblings agree after your mother's death, the will may be executed. However, if there is a minor or an imbecile among the heirs, the will shall not be executed concerning their share.