If he prays without facing the qiblah and without trying to work it out or find out

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A mistake in the direction of the qiblah
He prayed in a direction opposite to the qiblah out of ignorance

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Related Answers:
He prayed on his own and leading others when he was junub; what does he have to do?
They discovered that their mosque deviates from the qiblah by 17 degrees
Is it essential with regard to the Sunnah prayers that are done before the fard prayer that the time for that fard prayer should have begun?
A mistake in the direction of the qiblah
He prayed in a direction opposite to the qiblah out of ignorance

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