Translation
(39) Battles (Kitab Al-Malahim)
كتاب الملاحم
(1602) Chapter: Reports regarding Ibn As-Sa'id
(16) باب فِي خَبَرِ ابْنِ صَائِدٍ
Sunan Abi Dawud 4335 
A similar tradition has also been transmitted by Ibrahim (al-Nakha’l) through a different chain if narrators. I (Ibrahim) said to ‘Ubaidat al-Salmant :
Do you think that his one of them, that is al-Mukhtar (al-Thaqaff)? He said : He is from the leaders.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْجَرَّاحِ، عَنْ جَرِيرٍ، عَنْ مُغِيرَةَ، عَنْ إِبْرَاهِيمَ، قَالَ قَالَ عَبِيدَةُ السَّلْمَانِيُّ بِهَذَا الْخَبَرِ قَالَ فَذَكَرَ نَحْوَهُ فَقُلْتُ لَهُ أَتَرَى هَذَا مِنْهُمْ - يَعْنِي الْمُخْتَارَ - فَقَالَ عَبِيدَةُ أَمَا إِنَّهُ مِنَ الرُّءُوسِ ‏.‏
Grade :  Da'if Maqtu' (Al-Albani) ضعيف مقطوع  (الألباني)حكم :
Reference : Sunan Abi Dawud 4335
In-book reference : Book 39, Hadith 45
English translation : Book 38, Hadith 4321