And he saith unto him, Friend, how camest thou in hither not having a wedding garment? – Matthew 22:12

Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates? – 2 Corinthians 13:5

Notice that the king, when he thus turned a judge, dealt with this man only about himself. “How camest thou in hither?” Did I hear a whisper in some one’s mind, “Well, if I am unfit to be a church member, there are a great many others who are in the same condemnation.” What is that to you? See to thyself! When the king came in to see the guests he did not say to this man, “How came yonder persons here without the wedding garment?” His dealings were personal with him alone: “How camest thou in hither, not having on the wedding garment?” Professor, look to thyself, look to thyself. Let thy charity begin at home. Cast out the beam from thine own eye, and then mayst thou see clearly to cast out the mote that is in thy brother’s eye. He fixed on the one man, made him his entire audience, and directed to him the solemn question, “Friend, how camest thou in hither?” …I cannot but know that there are some of you who are not Christians though you bear the name. Like those of old, you say you are Jews and are not, but do lie. I am not now speaking of any who have fallen into sin and have suffered our rebuke…I mean others of you whose lives are all that could be desired openly, and yet there is a worm at the heart of your profession; you are not vitally godly, you have a name to live, and you keep that name untarnished as yet, but you are dead. Search ye yourselves; let your prayer be, “Gather not my soul with sinners, nor my life with bloody men.” I am as concerned about myself as about you, that I should be found “accepted in the Beloved;” lest after having preached to others I myself should be a castaway! Do let it be a matter of solemn anxiety with each one. If you have never come to Jesus, come now; if you have never sought holiness of life, seek it now. If you have never had the wedding garment, it is yet procurable; go ye to Him who freely gives it, the Lord will not refuse you; go to-day and He will accept you. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0976.cfm