Hadith #4183 (Sunan al-Nasa'i)
Book: The Book of al-Bay'ah
Narrator(s): al-Harmas bin Ziyad al-Bahli, Ikrama bin 'Ammar عكرمة بن عمار العجلي أبو عمار اليمامي, Umar bin Yonus bin al-Qasim عمر بن يونس بن القاسم

“We came in a delegation to the Messenger of Allah and my companions entered and asked their questions. I was the last of them to enter, and he said: ‘What is you question?’ I said: ‘O Messenger of Allah, when will emigration end?’ The Messenger of Allah said: ‘Emigration will not cease so long as the disbelievers are being fought.”‘

Source: https://parallelquran.com/hadith/sunan-al-nasai-4183/