From The Travels of Sir John Mandeville (c. 1356?)

And, therefore, I shall tell you what the soldan told me upon a day in his chamber.  He let void out of his chamber all manner of men, lords and others, for he would speak with me in counsel.  And there he asked me how the Christian men governed them in our country.  And I said him, “Right well, thanked be God!”

And he said me, “Truly nay!  For ye Christian men reck right nought, how untruly to serve God!  Ye should give ensample to the lewd people for to do well, and ye give them ensample to do evil.  For the commons, upon festival days, when they should go to church to serve God, then go they to taverns, and be there in gluttony all the day and all night, and eat and drink as beasts that have no reason, and wit not when they have enough.  . . .  They should be simple, meek and true, and full of alms-deeds, as Jesu was, in whom they trow; but they be all the contrary, and ever inclined to the evil, and to do evil.  And they be so covetous, that, for a little silver, they sell their daughters, their sisters and their own wives to put them to lechery.  And one withdraweth the wife of another, and none of them holdeth faith to another; but they defoul their law that Jesu Christ betook them to keep for their salvation.  And thus, for their sins, have they lost all this land that we hold.  For, for their sins, their God hath taken them into our hands, not only by strength of ourself, but for their sins.  For we know well, in very sooth, that when ye serve God, God will help you; and when he is with you, no man may be against you.  And that know we well by our prophecies, that Christian men shall win again this land out of our hands, when they serve God more devoutly; but as long as they be of foul and of unclean living (as they be now) we have no dread of them in no kind, for their God will not help them in no wise.”

And then I asked him, how he knew the state of Christian men.  And he answered me, that he knew all the state of all courts of Christian kings and princes and the state of the commons also by his messengers that he sent to all lands, in manner as they were merchants of precious stones, of cloths of gold and of other things, for to know the manner of every country amongst Christian men.  And then he let clepe in all the lords that he made void first out of his chamber, and there he shewed me four that were great lords in the country, that told me of my country and of many other Christian countries, as well as they had been of the same country; and they spake French right well, and the soldan also; whereof I had great marvel.

Alas! that it is great slander to our faith and to our law, when folk that be without law shall reprove us and undernim us of our sins, and they that should be converted to Christ and to the law of Jesu by our good ensamples and by our acceptable life to God, and so converted to the law of Jesu Christ, be, through our wickedness and evil living, far from us and strangers from the holy and very belief, shall thus appeal us and hold us for wicked livers and cursed.  And truly they say sooth, for the Saracens be good and faithful; for they keep entirely the commandment of the holy book Alkaron that God sent them by his messenger Mahomet, to the which, as they say, Saint Gabriel the angel oftentime told the will of God.