Abdur-Rahman bin Abd al-Qari 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, let him recite it between Fajr and Zuhr; it will be written for him as though he had recited it during the night."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4564