Some person slept without spending the night in Muzdalifah

Q: I performed the obligatory Hajj the last year 1416 A.H. We proceeded from `Arafah after sunset of the ninth day, but we did not reach Muzdalifah or spend the night there due to the heavy traffic on the roads leading to Muzdalifah. We continued driving to Muzdalifah with the intention of spending the night there, but we fell asleep at about 1:00 a.M before we reached it. We only arrived after sunrise on the Day of Nahr (Day of Sacrifice, 10th of Dhul-Hijjah, when pilgrims slaughter their sacrificial animals) and we did not stop over, but continued moving to Mina. I hope you will elaborate on the legal ruling of what we did. Are we obligated to take any further act? May Allah reward you with the best reward and keep you safe! (Part No. 10; Page No. 192

A: You are obligated to offer Dam (atonement required of a pilgrim for a wilful violation of a prohibition or obligation while in the ceremonial state for Hajj and `Umrah) because you neglected an obligatory rite of Hajj by sleeping and failing to pass the night in Muzdalifah. It was obligatory on you to keep on moving to Muzdalifah to pass the night of the Day of Nahr (Sacrifice, 10th of Dhul-Hijjah, when pilgrims slaughter their sacrificial animals) there in accordance with the direction of Prophet Muhammad (peace be upon him): Whoever offers this Salah (Prayer) with us and stands with us until we move on, and had stood before that in `Arafah by night or by day, has successfully completed their Hajj. Recorded by Imam Ahmad and by the four compilers of Sunan (Hadith compilations classified by jurisprudential themes). Almighty Allah says: Remember Allah (by glorifying His Praises, i.e. prayers and invocations, etc.) at the Mash'ar-il-Haram. May Allah grant us success. May Peace and Blessings of Allah be upon our Prophet Muhammad, his family and Companions!