It is narrated from Ya'la bin Umayyah (may Allah be pleased with him) that he said: I asked Umar bin Khattab (may Allah be pleased with him): "Allah Almighty has mentioned shortening (the prayer) in a state of fear, but where is the shortening besides fear?" Umar bin Khattab (may Allah be pleased with him) replied: "I was also surprised by the same thing that surprised you. So I asked the Messenger of Allah (peace and blessings be upon him), and he said: 'It is a charity that Allah has given to you, so accept His charity.'"
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 353
Hadith Takhrijأخرجه مسلم: صلاة المسافرين، باب صلاة المسافرين وقصرها: 686.
It is narrated from Ya'la bin Umayyah (may Allah be pleased with him) that he said: I asked Umar bin Khattab (may Allah be pleased with him): "Indeed, Allah Almighty has said: 'Shorten the prayers if you fear that the disbelievers may harm you' [النساء: 101] but now people are in safety?" So Umar (may Allah be pleased with him) said: "I was also surprised at what you are surprised at, so I asked the Messenger of Allah (ﷺ), and he (ﷺ) said: 'It is a charity, which Allah has given to you, so accept His charity.'"
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 354
Hadith Takhrijأخرجه مسلم: صلاة المسافرين، باب صلاة المسافرين وقصرها: 686.
It is narrated from Ibn al-Musayyib (may Allah have mercy on him) that he stated: The Messenger of Allah (ﷺ) said: "The best among you are those who, when they travel, shorten the prayer and break the fast," or he said: "those who do not fast."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 355
Hadith Takhrijإسناده ضعيف لإرساله: وشيخ الشافعي متروك. أخرجه البيهقي في معرفة السنن والآثار: 1514 - وعبد الرزاق: 4480.