Who will bring me into the strong city? who will lead me into Edom? …Through God we shall do valiantly: for He it is that shall tread down our enemies. Psalm 108:10,13

Have any of you enterprise enough to go up against the strong cities that are still in rebellion against the Lord Jesus Christ? Can any of you go, and look after those who walk the streets, and seek to bring them to Christ? That would be conquering Edom itself. Have you confidence enough to believe that the Lord Jesus Christ can give you that Petra-like city, that dark spot where thieves congregate, where blasphemy is the current language, and where profanity seems even to pollute the very air? …Then, having asked the question, “Who will lead me into Edom?” do not forget to pray, “Wilt not Thou, O God? Thou hast spoken; wilt Thou not also act, through Thy people, so that all flesh may see the salvation of God?” Let each child of God say, “O my Father, I believe that, weak and feeble as I am, my weakness and feebleness need be no hindrance to me if I go to Thy service in Thy strength! ‘Thou hast spoken in Thy holiness; I will rejoice;’ and, in Thy name, I will conquer the foe, and gather the spoil for Thee.” “Through God,” says David, “we shall do valiantly: for He it is that shall tread down our enemies.” Therefore, if ye believe in God, haste to the spoil of His enemies; quit you like men; be strong! If you really are linked with omnipotence, prove it. Do not talk about it, but let your deeds show that the Lord of hosts is with you, and that the God of Jacob is your refuge. If, indeed, the Lord’s arm be with you, smite as the Lord would smite. If, indeed, He speaks through you, speak as He would speak. Be strong, and very courageous, and press forward; in the name of God, set up your banners; and who knoweth whether even this feeble message of mine, in rousing you to action upon the basis of confidence in the Word of God, may not cast down some stronghold of the enemy, and make the walls of some mighty Jericho to fall flat to the ground? The Lord grant it for His name’s sake! Amen. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2864.cfm