Mishkat al-Masabih
Mishkat al-Masabih 1335
وَعَن يعلى بن أُميَّة قَالَ: قلت لعمر بن الْخطاب: إِنَّمَا قَالَ اللَّهُ تَعَالَى (أَنْ تَقْصُرُوا مِنَ الصَّلَاةِ إِنْ خِفْتُمْ أَنْ يَفْتِنَكُمُ الَّذِينَ كَفَرُوا) فَقَدْ أَمِنَ النَّاسُ. قَالَ عُمَرُ: عَجِبْتُ مِمَّا عَجِبْتَ مِنْهُ فَسَأَلْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ. فَقَالَ: «صَدَقَةٌ تَصَدَّقَ اللَّهُ بِهَا عَلَيْكُمْ فَاقْبَلُوا صدقته» رَوَاهُ مُسلم
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Ya’la ibn Umayya said: I said to Umar ibn al-Khattab: God, Most High, says that you may shorten the prayer if you fear that those who disbelieve will harm you, but now the people are safe. Umar replied: I was puzzled by the same thing you are puzzled by, so I asked the Messenger of God. He said: It is a charity God has granted you, so accept His charity. Muslim transmitted it.