The Ashley Madison hack will have a serious effect on churches. According to Ed Stetzer, as many as 400 pastors, deacons, elders and church staff members may resign this Sunday after their names surfaced on the list of users revealed in the Ashley Madison hack.

In a post on his Christianity Today blog, The Exchange, Stetzer said the number is based on “conversations with leaders from several denominations in the U.S. and Canada,” adding, “To be honest, the number of pastors and church leaders on Ashley Madison is much lower than the number of those looking to have an affair.” Along with being a contributing editor for CT, author and professor, Stetzer is the executive director of LifeWay Research, and a well-regarded expert on church leadership. He is also the executive editor of the Christian leadership publication Facts & Trends. All that to say, Stetzer is well-informed, and his number is likely accurate. Former social conservative lobbyist and Christian reality TV star Josh Duggar and Christian vlogger Sam Rader recently released their own statements, acknowledging that they were both users of the site, which facilitates adultery.