"The best number of companions is four; the best detachment is (that made up of) four hundred; and the best army is (that made up of) four thousand; and twelve thousand men will never be defeated because of their small numbers." [At-Tirmidhi]

عن ابن عباس -رضي الله عنهما- مرفوعاً: «خير الصحابة أربعة، وخير السَّرَايَا أَرْبَعُمِائة، وخير الجيوش أربعة آلاف، ولن يُغْلَبَ اثنا عشر ألفا مِنْ قِلَّةٍ» (الترمذي)