It wasnarrated that Ya'la bin Umayyah said:
"I asked 'Umar binKhattab: 'Allah says: "And when you travel in the land, there isnosin on you if you shorten the prayer if you fear that thedisbelieversmay put you in trial (attack you), verily, thedisbelievers are everto you open enemies," [4:101] but now thereis security and people aresafe.' He said: 'I found it strangejust as you do, so I asked theMessenger of Allah (ﷺ) about that,and he said: "It is charity thatAllah has bestowed upon you, soaccept His charity."
English reference: Vol. 1, Book 5, Hadith 1065
Arabic reference: Book 5, Hadith 1118