Charak Samhita
यत्र च सन्निहितोऽयं न तत्र बालग्रहा न रक्षांसि । न च कार्मणवेताला वहन्ति नाथर्वणा मन्त्राः ॥८८॥
He should also smear this paste over the umbrellas, banners and flags and exhibit them before the patient suffering from poisoning. A place where these recipe is kept becomes absolutely inaccessible to balagrahas rakshas karmana vetala (an atharvana mantra).
english translation
yatra ca sannihito'yaM na tatra bAlagrahA na rakSAMsi । na ca kArmaNavetAlA vahanti nAtharvaNA mantrAH ॥88॥
hk transliteration by Sanscript