The ruling on one who prays in a direction other than the qiblah in a land where he does not know its direction

Question:
Honorable Shaykh, a man traveled to an Arab country and did not know the qiblah in that country because there were few mosques there. So he prayed in a direction other than the qiblah for six days until he found someone who directed him and informed him of the qiblah. What is required of him?

Answer:
If there was no one with him to indicate the qiblah, and nothing to indicate the qiblah, and the month was [unclear], he prayed a valid prayer. Allah the Exalted said: . As for if there was someone around him from the Muslims, or it was not his relatives, or there were nearby mosques he could go to, or it is permissible, but as a custom