(89) باب فِيمَا يُسْتَحَبُّ مِنَ الْجُيُوشِ وَالرُّفَقَاءِ وَالسَّرَايَا
Narrated Abdullah ibn Abbas:
The Prophet (ﷺ) said: The best number of companions is four, the best number in expeditions four hundred, and the best number in armies four thousand; and twelve thousand will not be overcome through smallness of numbers.Abu Dawud said: What is correct is that this tradition is mursal (i.e. the link of the Companion is missing).
Reference: Sunan Abi Dawud 2611
In-book reference: Book 15, Hadith 135
English translation: Book 14, Hadith 2605