Not graded
Bulugh al-Maram 484
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 (ﷺ) "There is no Sahw (prostration for forgetfulness) in the prayer in time of danger." [ad-Daraqutni reported it through a weak chain of narrators].
Cited in Bulugh al-Maram (No. 484).