Whether we ought to pray for our enemies?

Objections

Objection 1 : It would seem that we ought not to pray for our enemies. According to Rm. 15:4, "what things soever were written, were written for our learning." Now Holy Writ contains many imprecations against enemies; thus it is written (Ps. 6:11): "Let all my enemies be ashamed and be . . . troubled, let them be ashamed and be troubled very speedily [*Vulg.: 'Let them be turned back and be ashamed.']." Therefore we too should pray against rather than for our enemies.
Objection 2 : Further, to be revenged on one's enemies is harmful to them. But holy men seek vengeance of their enemies according to Apoc. 6:10, "How long . . . dost Thou not . . . revenge our blood on them that dwell on earth?" Wherefore they rejoice in being revenged on their enemies, according to Ps. 57:11, "The just shall rejoice when he shall see the revenge." Therefore we should not pray for our enemies, but against them.
Objection 3 : Further, man's deed should not be contrary to his prayer. Now sometimes men lawfully attack their enemies, else all wars would be unlawful, which is opposed to what we have said above (Question [40], Article [1]). Therefore we should not pray for our enemies.