Musannaf Ibn Abi Shaybah 14783 — A man who omits Safa and Marwah: what

Mujahid and Ibrahim said: If a pilgrim on Hajj forgets the sa'y between Safa and Marwah, then (another) Hajj is due from him; and if he is performing Umrah, then he must perform Umrah (again). Nothing will suffice for him except the sa'y between Safa and Marwah.