Dua number 13

اَذْهِبِ الْبَأْسَ رَبَّ الْبَأْسِ ِ

azhebil baa-sa rabbal baa-se

Remove the affliction O Lord of affliction,

In al-Majaalis of Shaykh al-Toosi: In his narration from al-Haaris from Imam Ali (a.s.) who said:
When the Holy Prophet (s.a.w.a.) visited a sick person he (s.a.w.a.) would say:

اَنْتَ الشَّافِيْ لَا شَافِيَ اِلَّا اَنْتَ .وَ اشْف

wash fe antash shaafee laa shaafeya illaa anta.

and cure him for You are the Healer, there is no other Healer but You.