Adam Clarke on Romans 14:9

Christ both died and rose - That we are not our own, but are the Lord's both in life and death, is evident from this - that Christ lived, and died, and rose again, that he might be the Lord of the dead and the living; for his power extends equally over both worlds: separate, as well as embodied spirits, are under his authority; and he it is who is to raise even the dead to life: and thus all throughout eternity shall live under his dominion.

The clause και ανεστη, and rose, is wanting in several reputable MSS., and certainly is not necessary to the text. Griesbach omits the words, and reads απεθανε και εζησεν, died and lived; of which Professor White says, lectio indubie genuina: "this reading is indisputably genuine."