وَعَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { كَانَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-يُنَفِّلُ بَعْضَ مَنْ يَبْعَثُ مِنْ اَلسَّرَايَا لِأَنْفُسِهِمْ خَاصَّةً, سِوَى قَسْمِ عَامَّةِ اَلْجَيْشِ } مُتَّفَقٌ عَلَيْهِ 1‏.‏

‏1 ‏- صحيح.‏ رواه البخاري ( 3135 )‏، ومسلم ( 1750 )‏ ( 40 )‏.‏

Translation
’Abdullah bin As-Sa'di narrated that The Messenger of Allah (ﷺ) said

“Emigration (to fight the enemy) will continue as long as an enemy is fought.” Related by An-Nasa’i, and Ibn Hibban graded it as Sahih.