From THIS LINK, General Washington's statement 'To the General Committee, representing the United Baptist Churches in Virginia':
If I could have entertained the slightest apprehension that the Constitution framed by the Convention where I had the honor to preside might possibly endanger the religious rights of any ecclesiastical society, certainly I would never have placed my signature to it; and if I could now conceive that the general government might ever be so administered as to render the liberty of conscience insecure, I beg you will be persuaded that no one would be more zealous than myself to establish effectual barriers against the horrors of spiritual tyranny and every species of religious persecution. For, you doubtless remember, I have often expressed my sentiments that any man, conducting himself as a good citizen and being accountable to God alone for his religious opinions, ought to be protected in worshiping the Deity according to the dictates of his own conscience. While I recollect with satisfaction, that the religious society of which you are members have been, throughout America, uniformly and almost unanimously the firm friends to civil liberty, and the persevering promoters of our glorious revolution, I cannot hesitate to believe that they will be the faithful supporters of a free yet efficient general government. Under this pleasing expectation, I rejoice to assure them that they may rely upon my best wishes and endeavors to advance their prosperity,'
I am, gentlemen, your most obedient servant, GEORGE WASHINGTON.'
"The horrors of spiritual tyranny"? I can't believe I haven't seen those words before. Beautiful language, isn't it?