Al-Anfal - 8:43

إِذْ يُرِيكَهُمُ اللّهُ فِي مَنَامِكَ قَلِيلاً وَلَوْ أَرَاكَهُمْ كَثِيراً لَّفَشِلْتُمْ وَلَتَنَازَعْتُمْ فِي الأَمْرِ وَلَـكِنَّ اللّهَ سَلَّمَ إِنَّهُ عَلِيمٌ بِذَاتِ الصُّدُورِ
[8:43]
When Allah showed them to you in your dream as few; and if He had shown them to you as many you would certainly have become weak-hearted and you would have disputed about the matter, but Allah saved (you); surely He is the Knower of what is in the breasts.
Remember in thy dream Allah showed them to thee as few: if He had shown them to thee as many, ye would surely have been discouraged, and ye would surely have disputed in (your) decision; but Allah saved (you): for He knoweth well the (secrets) of (all) hearts.
When Allah showed them unto thee (O Muhammad) in thy dream as few in number, and if He had shown them to thee as many, ye (Muslims) would have faltered and would have quarrelled over the affair. But Allah saved (you). Lo! He knoweth what is in the breasts (of men).