CAMBRIDGE, Mass. — A historian of early Christianity at Harvard Divinity School has identified a scrap of papyrus that she says was written in Coptic in the fourth century and contains a phrase never seen in any piece of Scripture: “Jesus said to them, ‘My wife ...’ ”

The faded papyrus fragment is smaller than a business card, with eight lines on one side, in black ink legible under a magnifying glass. Just below the line about Jesus having a wife, the papyrus includes a second provocative clause that purportedly says, “she will be able to be my disciple.”