Abdur-Rahman bin Abd al-Qari (may Allah have mercy on him) said: I heard Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) say that the Prophet (peace and blessings be upon him) said: "Whoever sleeps through his portion (of night recitation), or part of it, and then recites it between Fajr and Zuhr, (the reward) will be written for him as though he had recited it during the night."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4557