[PAULUS libro quinto decimo ad Sabinum. ] §39.5.8.prQuae liberti imposita libertatis causa praestant, ea non donantur: res enim pro his intercessit.
[PAULUS in the fifteenth book on Sabinus.] The things which freedmen perform, having been imposed for the sake of their liberty, are not donated; for a consideration has intervened in return for them.