Answer
Subhaana dhil mulk walmalakootu, subhaana dhil-izz wal-adhmat wal-haybat wal-qudrat wal-kibriyaa wal-jabaroot. Subhaanal malikil hayyilladhiy laa yanaamu walaa yamuwtu. Subbuwhun qudduwsun rabbunaa wa rabbul malaa-ikati wal-ruwh
The Ulama have recommended it. It is not necessary, one may recite any Du’aa or Dhikr.
and Allah Ta’ala Knows Best
Moulana Imraan Vawda
FATWA DEPT.