Bulugh al-Maram 2 The Book of Prayer كتاب الصلاة 405

وَعَنْهُ مَرْفُوعًا: { لَيْسَ فِي صَلَاةِ اَلْخَوْفِ سَهْوٌ } أَخْرَجَهُ اَلدَّارَقُطْنِيُّ بِإِسْنَادٍ ضَعِيفٍ 1 . 1 – ضعيف. رواه الدارقطني (2/58/1) وضعفه.

Narrated [Ibn ‘Umar (RA)]: (This Hadith is) attributed to the Prophet (صلى الله عليه وسلم) “There is no Sahw (prostration for forgetfulness) in the prayer in time of danger.” [ad-Daraqutni reported it through a weak chain of narrators].