I think I have told you of the old story of the preacher who had been very successful in his preaching, but a message came from heaven to him that it would not have been so if it had not been for the prayers of an old deaf brother preacher, who sat on the pulpit stairs and pleaded with God for the conversion of the listeners. It may be true. We may appear to the eyes of men to have the credit of success, but all the while the real honor may belong to someone else, and I do certainly myself always ascribe the conversions brought about in this church to the prayers of God’s people. Let it always be so ascribed, and let God have all the glory in it.
But do pray for conversions. Never give up praying for your unconverted wife or husband! Never cease to pray for your unconverted children. Never let the devil tempt you to be silent concerning your ungodly neighbors, but day and night, in the house and on the road, lift up your hearts to God in real prayer, and say to him, “Oh! that Ishmael might live before you!” He has given us his pledge that he will answer: believe it, and you shall see it, and you shall have the joy of it while He shall have the glory. Amen
Charles Spurgeon, “Prayer-Meetings“