It is narrated from an Ansari companion (may Allah be pleased with him) that he heard the Noble Prophet (peace and blessings be upon him) say: Whoever among you is deficient in his obligatory prayers, Allah Almighty will complete it with his voluntary prayers.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23637
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف الإبهام الرجل الكندي، وضعف ابن لهيعة