I claim the ornamental design for a bed commode, as shown and described.
FIG. 1 is a top left front perspective view of a bed commode showing my new design;
FIG. 2 is a top left front perspective view thereof with a removable collection tray shown in broken lines, wherein the tray is shown for illustrative purposes only and does not form part of the claimed design;
FIG. 3 is a bottom left front perspective view thereof;
FIG. 4 is a bottom right front perspective view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front elevation view thereof;
FIG. 8 is a rear elevation view thereof;
FIG. 9 is a left side elevation view thereof; and,