مُسْنَدِ عُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ
2  
Musnad `Umar b. al-Khattab (ra)
Musnad Ahmad 244, 245
It was narrated that Ya`la bin Umayyah said:
I said to `Umar bin al-Khattab. People are shortening the prayer today, and Allah says: “If you fear that the disbelievers may put you in trial (attack you)` [an-Nisa` 4:101). But that time [i.e., time of fear] has gone, He said: I wondered the same thing as you are wondering, and I asked the Messenger of Allah (ﷺ) about that. He said: `It is a charity that Allah has bestowed upon you, so accept His charity.”

`Abdur-Razzaq told us, Ibn Juraij told us I heard `Abdur-Rahman bin ‘Abdullah bin Abi ‘Ammar narrate... and he mentioned [the same report].

حَدَّثَنَا يَحْيَى، عَنِ ابْنِ جُرَيْجٍ، حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ اللَّهِ بْنِ أَبِي عَمَّارٍ، عَنْ عَبْدِ اللَّهِ بْنِ بَابَيْهِ، عَنْ يَعْلَى بْنِ أُمَيَّةَ، قَالَ قُلْتُ لِعُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ إِقْصَارُ النَّاسِ الصَّلَاةَ الْيَوْمَ وَإِنَّمَا قَالَ اللَّهُ عَزَّ وَجَلَّ ‏{‏إِنْ خِفْتُمْ أَنْ يَفْتِنَكُمْ الَّذِينَ كَفَرُوا‏}‏ فَقَدْ ذَهَبَ ذَاكَ الْيَوْمَ فَقَالَ عَجِبْتُ مِمَّا عَجِبْتَ مِنْهُ فَذَكَرْتُ ذَلِكَ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ صَدَقَةٌ تَصَدَّقَ اللَّهُ بِهَا عَلَيْكُمْ فَاقْبَلُوا صَدَقَتَهُ

حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَنْبَأَنَا ابْنُ جُرَيْجٍ سَمِعْتُ عَبْدَ الرَّحْمَنِ بْنَ عَبْدِ اللَّهِ بْنِ أَبِي عَمَّارٍ يُحَدِّثُ فَذَكَرَهُ‏.‏

Grade: Sahih (Darussalam) [ Muslim (686) Sahih (Darussalam) [ (Darussalam)
Reference : Musnad Ahmad 244, 245
In-book reference : Book 2, Hadith 159