AbuAyyub heard the Messenger of Allah ﷺ say: Capitals will be conquered at your hands, and you will have to raise companies in large armies. A man will be unwilling to join a company, so he will escape from his people and go round the tribes offering himself to them, saying: Whose place may I take in such and such expedition? Whose place may I take in such and such expedition? Beware: That man is a hireling to the last drop of his blood. (Using translation from Abū Dāʾūd 2525)
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّهَا سَتُفْتَحُ عَلَيْكُمُ الْأَمْصَارُ وَسَيَضْرِبُونَ عَلَيْكُمْ فِيهَا بُعُوثًا يُنْكِرُ الرَّجُلُ مِنْكُمُ الْبَعْثَ فَيَتَخَلَّصُ مِنْ قَوْمِهِ وَيَعْرِضُ نَفْسَهُ عَلَى الْقَبَائِلِ يَقُولُ مَنْ أَكْفِيهِ بَعْثَ كَذَا وَكَذَا أَلَا وَذَلِكَ الْأَجِيرُ إِلَى آخِرِ قَطْرَةٍ مِنْ دَمِهِ