He stoned on the 11th Day, then he performed the Farewell Tawaf and traveled
Question :
What is the ruling on whoever stoned the pillars on the 11th day, then he performed the Farewell Tawaf and traveled?
Answer:
If he stoned on the 11th day, then made the Farewell Tawaf at the House (the Ka'bah) and then he traveled, he has left off two obligations. They are the stoning of the pillars on 12th day and spending the night in Mina during the night before it (i.e., on the night of the 11th). Therefore, he must offer two ransoms (of atonement) according to what many of the people of knowledge have said. He is to sacrifice two animals in Makkah and give them (i.e., their meat) away in charity there.
Source:
Ash-Shaykh Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 4 Page 257