HELP- heating already cooked Prime rib

[DreaminDisney]

I bought 2 pre-cooked, total 8 lbs (4 lb each) prime rib roasts (without bones) there is nothing on there on heating it up.

I need to heat them together. What temp do you recommend and for how long? Do I cover it? I did a search and couldn't find anything except it should not be microwaved which I had no plans on doing anyway.

Do can someone help me?

 

[ChristmasElf]

Put the roast in a roasting pan and cover tightly with foil.
Oven at 350 degrees. Heat for about 25 minutes and check to see if warm enough. If not, place back in oven til temp desired.