Delaying Sa`y until after making Tawaf the following day

Q 2. A man performed 'Umrah during the time of Hajj. He first performed Tawaf-ul-Qudum (circumambulation of the Ka`bah on arrival in Makkah) but did not perform Sa`y (going between Safa and Marwah during Hajj and `Umrah) until the following day because he was very exhausted. What is the ruling on the validity of his 'Umrah?

A.2 Delaying of Sa`y until after making Tawaf (circumambulation of the Ka`bah) to the following day is permissible, if this was to be extremely hard on him.May Allah grant us success. May Peace and Blessings of Allah be upon our Prophet Muhammad, his family and his Companions!