Barcelona will report Malaga president Abdullah Al-Thani to Spain's Football Federation for comments on Twitter, reports BBC Sport.
The row erupted after a Barca fan asked Al-Thani on Twitter for Malaga to beat title rivals Real Madrid on 21 May.
"With the help of Allah we'll beat them on the pitch, but the scum of Catalonia will not smell the championship after telling lies about coach Michel," wrote Al-Thani in Arabic.
Malaga boss Michel upset Barca fans by hinting he wanted Real to win La Liga.