Prayer: Intentionally Eating or Drinking
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1140
Based on obligatory precaution, even if the form of prayer does not break by intentionally eating or drinking, one must perform the prayer again, irrespective of whether or not muwālāh is maintained, i.e. irrespective of whether or not it can be said that he is performing [the parts of] the prayer in close succession.