Bismillaah:

Asmaa bint Umays رضي الله عنها said:

The Messenger of Allaah صلي الله عليه وسلم said to me,

" Shall I teach you some words that you should say at the time of كرب Karb [ heartache, distress ] or in Karb ? Say:

‏أَللَّهُ ‏ ‏أَللَّهُ رَبِّي لَا أُشْرِكُ بِهِ شَيْئًا

“Allaahu Allaahu Rabbi Laa Ushriku Bihi Shai’a”

Allaah, Allaah My Lord! I do not associate anything as a partner/co-equal with Him!

Takhreej:

{ Imam Abu Dawud in his Sunnan and its chain graded as Hasan by Shaykh Al Albaani, Abu Taahir and Subay Hamza Haakimi. Al Mundhiri said, An-Nasaa’i reports it in Mursal form and in Musnad form.}

*** And Allaah عزوجل knows best ***