Quran 2:143 — The Heifer (Al-Baqarah)

We thus made you an impartial community, that you may serve as witnesses among the people, and the messenger serves as a witness among you. We changed the direction of your original Qiblah only to distinguish those among you who readily follow the messenger from those who would turn back on their heels. It was a difficult test, but not for those who are guided by GOD. GOD never puts your worship to waste. GOD is Compassionate towards the people, Most Merciful.

[2:142] The fools among the people would say, "Why did they change the direction of their Qiblah?" Say, "To GOD belongs the east and the west; He guides whoever wills in a straight path."

[2:144] We have seen you turning your face about the sky (searching for the right direction). We now assign a Qiblah that is pleasing to you. Henceforth, you shall turn your face towards the Sacred Masjid. Wherever you may be, all of you shall turn your faces towards it. Those who received the previous scripture know that this is the truth from their Lord. GOD is never unaware of anything they do.