Question Summary:
What dua did a certain Sahabi RA recite that prevented his house from burning yet all the other houses got burnt. I think it was Hazrat Abu Darda RA.

Question Detail:

What dua did a certain Sahabi RA recite that prevented his house from burning yet all the other houses got burnt. I think it was Hazrat Abu Darda RA.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Abu Darda Radiallahu Anhu reports that I have heard the Prophet Sallallahu Alaihi Wa Sallam saying “Whoever recites this duaa in the beginning of the day will not be afflicted by any calamity until the evening. And whoever recites it at the end of the day will not be afflicted by any calamity until the morning.”
"اللهم أنت ربي لا إله إلا أنت عليك توكلت، وأنت رب العرش الكريم، ما شاء الله كان، وما لم يشأ لم يكن، لا حول ولا قوة إلا بالله العلي العظيم، أعلم أن الله على كل شيء قدير، وأن الله قد أحاط بكل شيء علما، اللهم إني أعوذ بك من شر نفسي، ومن شر دابة أنت آخذ بناصيتها، إن ربي على صراط مستقيم"(كنز العمال)[1]
 
And Allah Ta’āla Knows Best
Mawlana Abdul Hannan Nizami
Student Darul Iftaa
Chicago, USA
Checked and Approved by,
Mufti Ebrahim Desai.