What to pray for?

He has spots on his liver, tumors in his colon, lymp nodes, and even on the sac that holds all of his organs together. Surgery for the tumors that are causing him so much pain aren't surgically ready to be removed until he's completed chemo and dr.s are saying surgery hopefully in about 4months.  We think he is coming back here to MD Anderson Houston in 2 weeks for another round of Chemo (he lives in MS) and to do a procedure to help open up the bowels.  He is either in pain or sick with nausea. Prayers for his comfort and hearling are much appreciated.