"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.'" (Using translation from Nasāʾī 2871)
قَدِمَ رَسُولُ اللهِ ﷺ لِأَرْبَعٍ مَضَيْنَ مِنْ ذِي الْحِجَّةِ وَقَدْ أَهَلَّ بِالْحَجِّ فَصَلَّى الصُّبْحَ بِالْبَطْحَاءِ وَقَالَ «مَنْ شَاءَ أَنْ يَجْعَلَهَا عُمْرَةً فَلْيَفْعَلْ»