Jami` at-Tirmidhi 3034
جامع الترمذي#3034SahihNarrated Ya'la bin Umayyah:"I said to 'Umar [bin Al-Khattab]: 'Allah said: That you shorten the Salat if you fear and the people are safe (4:101).' So 'Umar said: 'I wondered about that just as you have wondered. So I mentioned that to the Messenger of Allah (ﷺ), and he said: "It is charity which Allah has given to you, so accept His charity
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih Muslim
In-book reference: 47:86