and Allah said "And proclaim the pilgramage among men; they will come to thee on foot and on every kind of camel. Lean on account of Journeys through deep and distant mountain highways" Surah 22 ~ Al Hajj Part 27
The army of the Makkans advanced into the open space which separated the Muslims from the idolaters. According to Arab usage, the battle was began by simple combats. The engagement that became general. The result of the battle was that the Makkans were driven back with great loss.
Battle of Badr in the Valley of Badr (Courtesey ~ The Message)
Several of their chiefs were slain, including Abu Jahl. A large number of idolaters remained prisoners in the hands of the Muslims. They were, contrary to all usage and traditions of the Arabs, treated with the greatest humanity. The Prophet gave strict orders that sympathy should be shown to them in their misfortune and that they should be treated with kindness. These instructions were faithfully obeyed by the Muslims to whose care the prisoners were confided. Dealing with this event, Sir William Muir, in his book Life of Muhammad, quotes one of the prisoners saying: "Blessing be on the men of Medina ; they made us ride, while they themselves walked; they gave us wheaten bread to eat, when there was little of it, contenting themselves with dates."
Almighty Allah said: And Allah has already made you victorious at Badr, when you were a weak little force. So fear Allah much (abstain from all kinds of sins and evil deeds which He has forbidden and love Allah much, perform all kinds of good deeds which He has ordained) that you may be grateful. (Remember) when you (Muhammad) said to the believers, "is it not enough for you that your Lord (Allah) should help you with three thousand angels; sent down? Yes, if you hold on to patience and piety, and the enemy comes rushing at you; your Lord will help you with five thousand angels having marks of distinction. Allah made it not but as a message of good news for you and as an assurance to your hearts. And there is no victory except from Allah the All Mighty, the All Wise. That He might cut off a part of those who disbelieve, or expose them to infamy, so that they retire frustrated." (3:123-127 Quran).
The remarkable circumstances, which led to the victory of Badr, and results, which followed from it, made a deep impression on the minds of the Muslims; the angels of the heaven had battled on their side against their enemies. The division of the spoils created some dissension between the Muslim warriors. For the moment, the Prophet divided it equally among all. Subsequently, a Quran revelation laid down a rule for future division of the spoils. According to this rule, a fifth was reserved for the public treasury for the support of the poor and indigent, while the distribution of the remaining four fifths was left to the discretion of the Chief of the State.
The next battle between the Quraish and the Muslims was the battle of Uhud, a hill about four miles to the north of Medina .
Mount Uhud today that saw the Battle of Uhud then
The idolaters, to revenge their loss at Badr, made tremendous preparations for a new attack upon the Muslims. They collected an army of three thousand strong men, of who seven hundred were armed with coats of mail, and two hundred horses. These forces advanced under the conduct of Abu Sufyan and encamped at a village six miles from Medina , where they gave themselves up to spoiling the fields and flocks of the Medinites. The Prophet, being much inferior to his enemies in number, at first determined to keep himself within the town and to receive them there; but afterwards, the advice of some of his companions prevailing he marched out against them at the head of one thousand men, of whom one hundred were armed with coats of mail; but he had no more than one horse, besides his own, in his whole army. With these forces he halted at Mount Uhud . He was soon abandoned by Abdullah Ibn Ubai, the leader of the Hypocrites, with three hundred of his followers. Thus, the small force of the Prophet was reduced to seven hundred.