The Battle of Badr
[3:121] Recall that you (Muhammad) were among your people when you set out to assign to the believers their positions for battle. GOD is Hearer, Omniscient.
[3:122] Two groups among you almost failed, but GOD was their Lord. In GOD the believers shall trust.
[3:123] GOD has granted you victory at Badr, despite your weakness. Therefore, you shall observe GOD, to show your appreciation.
http://en.wikipedia.org/wiki/Battle_of_Badr
How do you show your appreciation?
[2:185] Ramadan is the month during which the Quran was revealed, providing guidance for the people, clear teachings, and the statute book. Those of you who witness this month shall fast therein. Those who are ill or traveling may substitute the same number of other days. GOD wishes for you convenience, not hardship, that you may fulfill your obligations, and to glorify GOD for guiding you, and to express your appreciation.
[22:36] The animal offerings are among the rites decreed by GOD for your own good.* You shall mention GOD’s name on them while they are standing in line. Once they are offered for sacrifice, you shall eat therefrom and feed the poor and the needy. This is why we subdued them for you, that you may show your appreciation.
[22:37] Neither their meat, nor their blood reaches GOD. What reaches Him is your righteousness. He has subdued them for you, that you may show your appreciation by glorifying GOD for guiding you. Give good news to the charitable.
[34:13] They made for him anything he wanted – niches, statues, deep pools, and heavy cooking pots. O family of David, work (righteousness) to show your appreciation. Only a few of My servants are appreciative.