Musannaf Ibn Abi Shayba 3:1015

Ma'n ibn 'Isa narrated to us, from Ibn Abi Dhi'b, from al-Zuhri, who said: Whoever prays facing other than the qibla, and then realizes it while he is still within the time [of the prayer], then he must repeat it. And if he is not within the time, then he does not have to repeat it.