5 “In the multitude of your power Your enemies shall lie to You.” For this purpose he says, “to You your enemies shall lie,” in order that great may be Your power. What is this? With more attention hearken. The power of our Lord Jesus Christ most chiefly appeared in the Resurrection, from whence this Psalm has received its title. And rising again, He appeared to His disciples. He appeared not to His enemies, but to His disciples. Crucified He appeared to all men, rising again to believers: so that afterwards also he that would might believe, and to him that should believe, resurrection might be promised.
Many holy men wrought many miracles; no one of them when dead did rise again: because even they that by them were raised to life, were raised to life to die....Because therefore the Jews might say, when the Lord did miracles, Moses has done these things, Elias has done, Eliseus has done them: they might for themselves say these words, because those men also did raise to life dead men, and did many miracles: therefore when from Him a sign was demanded, of the peculiar sign making mention which in Himself alone was to be, He says, “This generation crooked and provoking seeks a sign, and a sign shall not be given to it, except the sign of Jonas the Prophet: for as Jonas was in the belly of the whale three days and three nights, so shall be also the Son of Man in the heart of the earth three days and three nights.” In what way was Jonas in the belly of the whale?
Was it not so that afterwards alive he was vomited out? Hell was to the Lord what the whale was to Jonas. This sign peculiar to Himself He mentioned, this is the most mighty sign. It is more mighty to live again after having been dead, than not to have been dead. The greatness of the power of the Lord as He was made Man, in the virtue of the Resurrection does appear....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)