Quranic Verses about Witness.
The word Witness شَهِيدٌ mentioned many times in Quran, few instances are listed below.
If you have doubts about what We have sent down to Our servant, produce another sura equal to it, and call your witnesses, besides Allah, if you are telling the truth. (2:23)
And when We made a covenant with you not to shed your blood and not to expel one another from your homes, you agreed and were all witnesses. (2:84)
In this way We have made you a middlemost community, so that you may act as witnesses against mankind and the Messenger as a witness against you. We only appointed the direction you used to face in order to know those who follow the Messenger from those who turn round on their heels. Though in truth it is a very hard thing–except for those Allah has guided. Allah would never let your faith go to waste. Allah is All-Gentle, Most Merciful to mankind. (2:143)
Among the people there is someone whose words about the life of this world excite your admiration, and he calls Allah to witness what is in his heart, while he is in fact the most hostile of adversaries. (2:204)
You who believe! When you take on a debt for a specified period, write it down. A writer should write it down between you justly. No writer should refuse to write; as Allah has taught him, so he should write. The one incurring the debt should dictate and should have fear of Allah, his Lord and not reduce it in any way. If the person incurring the debt is incompetent or weak or unable to dictate, then his guardian should dictate for him justly. Two men among you should act as witnesses. But if there are not two men, then a man and two women with whom you are satisfied as witnesses; then if one of them forgets, the other can remind her. Witnesses should not refuse when they are called upon. Do not think it too trivial to write down, whether small or large, with the date that it falls due. Doing that is more just in Allah’s sight and more helpful when bearing witness and more likely to eliminate any doubt–unless it is an immediate transaction hand to hand, taken and given without delay. There is nothing wrong in your not writing that down. Call witnesses when you trade. Neither writer nor witness should be put under pressure. If you do that, it is deviancy on your part. Have fear of Allah and Allah will give you knowledge. Allah has knowledge of all things. (2:282)
Allah bears witness that there is no god but Him, as do the angels and the people of knowledge, upholding justice. There is no god but Him, the Almighty, the All-Wise. (3:18)
When ‘Isa sensed disbelief on their part, he said, ‘Who will be my helpers to Allah?’ The disciples said, ‘We are Allah’s helpers. We believe in Allah. Bear witness that we are Muslims. Our Lord, we believe in what You have sent down and have followed the Messenger, so write us down among the witnesses.’ (3:52-53)
Say, ‘People of the Book! Come to a proposition which is the same for us and you–that we should worship none but Allah and not associate any partners with Him and not take one another as lords besides Allah.’ If they turn away, say, ‘Bear witness that we are Muslims.’ (3:64)
People of the Book! Why do you reject Allah’s Signs when you yourselves are there as witnesses? (3:70)
Remember when Allah made a covenant with the Prophets: ‘Now that We have given you a share of the Book and Wisdom, and then a messenger comes to you confirming what is with you, you must believe in him and help him.’ He asked, ‘Do you agree and undertake my commission on that condition?’ They replied, ‘We agree.’ He said, &lsqu