عن ابن عمر رضي الله عنهما قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏:‏ ‏"‏لو أن الناس يعلمون من الوحدة ما أعلم ما سار راكب بليل وحده” ‏(‏‏(‏رواه البخاري‏)‏‏)‏‏.‏

Ibn 'Abbas (May Allah be pleased with them) reported

The Prophet (ﷺ) said, "The best number of companions is four; the best detachment is four hundred and the best army is four thousand; and twelve thousand men will not be defeated as a result of smallness of number."[At-Tirmidhi and Abu Dawud].