What is Sharia?

From: http://quranicteachings.co.uk/sharia.htm

The root of the word is Sh-R-E (shin-ra-ayn).
The word SHARIAtun literally means “A watering place”. But the term is not applied by the Arabs to any watering place but the one that is PERMANENT and MANIFEST (i.e. apparent to the eye) like the water of rivers and not water from which one draws with the well-rope. TASHREEUN signifies bringing camels to the watering place to drink without requiring in doing so to draw with the pulley and its appurtenances nor to give them to drink in a watering-trough or tank. The term SHAR’UN is applied (originally) to a manifest, plain or an open track or road or way and metaphorically to a way of belief or conduct. The term SHAARI’UN is applied to any great street that is a thoroughf are and is plain, conspicuous and manifest. The term Al-SHARIA is, thus, applied to a way of belief and conduct that is eternal and manifest; or a law or ordinance or statute.

Allah has given the SHARIA
وَأَنْزَلْنَا إِلَيْكَ الْكِتَابَ بِالْحَقِّ مُصَدِّقًا لِمَا بَيْنَ يَدَيْهِ مِنَ الْكِتَابِ وَمُهَيْمِنًا عَلَيْهِ فَاحْكُمْ بَيْنَهُمْ بِمَا أَنْزَلَ اللَّهُ وَلا تَتَّبِعْ أَهْوَاءَهُمْ عَمَّا جَاءَكَ مِنَ الْحَقِّ لِكُلٍّ جَعَلْنَا مِنْكُمْ شِرْعَةً وَمِنْهَاجًا وَلَوْ شَاءَ اللَّهُ لَجَعَلَكُمْ أُمَّةً وَاحِدَةً وَلَكِنْ لِيَبْلُوَكُمْ فِي مَا آتَاكُمْ فَاسْتَبِقُوا الْخَيْرَاتِ إِلَى اللَّهِ مَرْجِعُكُمْ جَمِيعًا فَيُنَبِّئُكُمْ بِمَا كُنْتُمْ فِيهِ تَخْتَلِفُونَ
5:48 To thee We sent the Scripture in truth, confirming the scripture that came before it, and guarding it in safety: so judge between them by what Allah hath revealed, and follow not their vain desires, diverging from the Truth that hath come to thee. To each among you have we prescribed a law and an open way. If Allah had so willed, He would have made you a single people, but (His plan is) to test you in what He hath given you: so strive as in a race in all virtues. The goal of you all is to Allah. it is He that will show you the truth of the matters in which ye dispute;
شَرَعَ لَكُمْ مِنَ الدِّينِ مَا وَصَّى بِهِ نُوحًا وَالَّذِي أَوْحَيْنَا إِلَيْكَ وَمَا وَصَّيْنَا بِهِ إِبْرَاهِيمَ وَمُوسَى وَعِيسَى أَنْ أَقِيمُوا الدِّينَ وَلا تَتَفَرَّقُوا فِيهِ كَبُرَ عَلَى الْمُشْرِكِينَ مَا تَدْعُوهُمْ إِلَيْهِ اللَّهُ يَجْتَبِي إِلَيْهِ مَنْ يَشَاءُ وَيَهْدِي إِلَيْهِ مَنْ يُنِيبُ
42:13 The same DEEN has He established for you as that which He enjoined on Noah - the which We have sent by inspiration to thee - and that which We enjoined on Abraham, Moses, and Jesus: Namely, that ye should remain steadfast in religion, and make no divisions therein: to those who worship other things than Allah, hard is the (way) to which thou callest them. Allah chooses to Himself those whom He pleases, and guides to Himself those who turn (to Him).
ثُمَّ جَعَلْنَاكَ عَلَى شَرِيعَةٍ مِنَ الأمْرِ فَاتَّبِعْهَا وَلا تَتَّبِعْ أَهْوَاءَ الَّذِينَ لا يَعْلَمُونَ
45:18 And now have We set thee (O Muhammad) on a clear road of (Our) Commandment; so follow it, and follow not the whims of those who know not.

ALLAH does not take partners for making SHARIA
أَمْ لَهُمْ شُرَكَاءُ شَرَعُوا لَهُمْ مِنَ الدِّينِ مَا لَمْ يَأْذَنْ بِهِ اللَّهُ وَلَوْلا كَلِمَةُ الْفَصْلِ لَقُضِيَ بَيْنَهُمْ وَإِنَّ الظَّالِمِينَ لَهُمْ عَذَابٌ أَلِيمٌ
42:21 Have they such associates of ALLAH as have made lawful for them in religion that which ALLAH has not allowed? And but for Our word about the final judgment, the matter would have been decided by now between them. And, surely, the wrongdoers will have a grievous punishment.

Important
And do not follow (blindly) any information of which you have no (direct) knowledge. (Using your faculties of perception and conception, you must verify it for yourself. (In the Court of your Lord,) you will be held accountable for your hearing, sight, and the faculty of reasoning."[17:36]