Ummayah bin Abdullah bin Khalid reports that I said to Sayyiduna Abdullah bin Umar (may Allah be pleased with them): "We do not find mention of the prayer of residence and fear in the Noble Qur'an." So Sayyiduna Abdullah (may Allah be pleased with him) said: "O nephew, indeed Allah Almighty sent Muhammad (peace be upon him) to us, and we did not know anything, therefore we (now) do as we saw Muhammad (peace be upon him) doing."
It is not that His mention is exalted, that He specified their number in the Book with a similar revelation inscribed between the two covers, but this is of the kind whose obligation Allah has summarized in the Book and entrusted its explanation to His Prophet from Allah by word and deed. Allah said: (And We sent down to you the Reminder that you may make clear to the people what was sent down to them).__QUR_N__
Hadith Referenceصحيح ابن خزيمه / جماع أبواب الفريضة فى السفر / 946