I took Abu Mabad to the Prophet ﷺ in order that he might give him the pledge of allegiance for migration. The Prophet ﷺ said, "Migration has gone to its people, but I take the pledge from him (i.e. Abu Mabad) for Islam and Jihad."

عَنْ مُجَاشِعِ بْنِ مَسْعُودٍ انْطَلَقْتُ بِأَبِي مَعْبَدٍ إِلَى النَّبِيِّ ﷺ لِيُبَايِعَهُ عَلَى الْهِجْرَةِ قَالَ مَضَتِ الْهِجْرَةُ لأَهْلِهَا أُبَايِعُهُ عَلَى الإِسْلاَمِ وَالْجِهَادِ فَلَقِيتُ أَبَا مَعْبَدٍ فَسَأَلْتُهُ فَقَالَ صَدَقَ مُجَاشِعٌ وَقَالَ خَالِدٌ عَنْ أَبِي عُثْمَانَ عَنْ مُجَاشِعٍ أَنَّهُ جَاءَ بِأَخِيهِ مُجَالِدٍ

My brother and I came to the Prophet ﷺ and I requested him to take the pledge of allegiance from us for migration. He said, "Migration has passed away with its people." I asked, "For what will you take the pledge of allegiance from us then?" He said, "I will take (the pledge) for Islam and Jihad."

أَتَيْتُ النَّبِيَّ ﷺ أَنَا وَأَخِي فَقُلْتُ بَايِعْنَا عَلَى الْهِجْرَةِ فَقَالَ مَضَتِ الْهِجْرَةُ لأَهْلِهَا فَقُلْتُ عَلاَمَ تُبَايِعُنَا قَالَ عَلَى الإِسْلاَمِ وَالْجِهَادِ

[Machine] I came with my brother Ma'bad to the Prophet ﷺ after the conquest. I said, "O Messenger of Allah, I have come to you with my brother to pledge allegiance to him for the migration." He said, "The emigrants have taken what they needed." So I asked, "What can we pledge allegiance to him for?" He said, "For Islam, faith, and striving in the cause of Allah." I met Ma'bad later, and he was the eldest of the two. I asked him, and he said, "Mujashir is truthful."

قَدِمْتُ بِأَخِي مَعْبَدٍ عَلَى النَّبِيِّ ﷺ بَعْدَ الْفَتْحِ فَقُلْتُ يَا رَسُولَ اللهِ جِئْتُكَ بِأَخِي لِتُبَايِعَهُ عَلَى الْهِجْرَةِ فَقَالَ ذَهَبَ أَهْلُ الْهِجْرَةِ بِمَا فِيهَا فَقُلْتُ عَلَى أَيِّ شَيْءٍ تُبَايِعُهُ؟ قَالَ عَلَى الْإِسْلَامِ وَالْإِيمَانِ وَالْجِهَادِ قَالَ فَلَقِيتُ مَعْبَدًا بَعْدُ وَكَانَ أَكْبَرَهُمَا فَسَأَلْتُهُ فَقَالَ صَدَقَ مُجَاشِعٌ