" مَنْ شَاءَ أَنْ يَجْعَلَهَا عُمْرَةً فَلْيَفْعَلْ "
It was narrated that Ibn Abbas said: "The Messenger of Allah came on the fourth day of Dhul-Hijjah having entered Ihram for Hajj. He prayed Subh in Al-Batha and said: 'Whoever wants to make it Umrah, let him do so.'"