Musannaf Ibn Abi Shaybah 32442 — Book of Faith

Zurarah bin Awfa (may Allah have mercy on him) said that Sayyiduna Tamim al-Dari (may Allah be pleased with him) said: On the Day of Resurrection, the first of a man's deeds to be reckoned will be the obligatory prayer. If it turns out complete, well and good. Otherwise it will be said: "See whether he has any store of voluntary prayers." If he has, the obligatory prayer will then be completed from his voluntary prayers. And if his obligatory prayers are not complete and he has no store of voluntary prayers either, then he will be seized by his two extremities and thrown into Hell in this manner.