I can show where it's in Scripture, but you'd reject it because it's not stated in the Bible the way you want. You, like most Protestants, demand others to provide scriptural verses that explicitly appear in the Bible for what they believe in order to be true, but you don't abide by that standard yourself. If you did, then you wouldn't be stating as a fact that Mary of Joseph inherited the stain of original sin and committed sins, because nowhere in Scripture does it say "only Jesus never committed sins." In 1 Pet. 2:22, neither does it say, "only Christ committed no sin," but rather, "Christ ... Who committed no sin." Jesus, including, for example, children who have died without having committed sins, are exceptions to the "all have sinned" (Rom. 3:22). For these reasons, Rom. 3:22 isn't proof Mary sinned, nor that She can't also be an exception.