What is the deal with the Ash Wednesday cross?

Some people had ash smeared on their forehead vaguely resembling a cross on Wednesday, and somehow this has something to do with Psalm 51...

Find a church here: https://locator.lcms.org/church

Discord Link to multi-denominational Christian Server (if you join up, be sure to say "Hi" when you find me!) : Discord.gg/Christian

Are you in Tucson, do you need a faithful Lutheran (LCMS) church? Come by and visit, leave me a comment and I can give directions!