He said to 'Abdullah bin 'Umar: "We find (mention of) prayer when one is at home (i.e., not traveling) and prayer at times of fear in the Quran, but we do not find any mention in the Quran of prayer when traveling. Ibn Umar said to him: 'O son of my brother, Allah (SWT) send Muhammad (ﷺ) to us when we did not know anything, and all we should do is to do that which we saw Muhammad (ﷺ) doing.'"
Sunan an-Nasa'i Book 15, Hadith 2
← Previous Hadith "I said to 'Umar bin Al-Khattab: 'There is no sin on you if you shorten salah and if you fear that the disbelievers may put you in trial (attack you). But now the people are safe.' 'Umar said: 'I wondered the same thing, so I asked the Messenger of Allah (ﷺ) about that and he said: This is a favor from Allah (SWT) to you, so accept His favor."

Sunan an-Nasa'i Book 15, Hadith 1 Next Hadith → The Messenger of Allah (ﷺ) set out from Makkah to Al-Madinah, fearing nothing but the Lord of the worlds, and praying two rak'ahs.

Sunan an-Nasa'i Book 15, Hadith 3