5456. 'And he shut them up in custody' means a separation of them from himself. This is clear from the meaning of 'putting (or shutting up) in custody' as a casting aside, and so a separation, dealt with in 5083, 5101.

5101. 'Who were with him in the custody of his lord's [house]' means which had been cast aside. This is clear from the meaning of 'being put into custody', and so being in custody, as a state when one has been cast aside, also dealt with above, in 5083.