Hadith.2940 - Mu'awiyah ibn Ammar narrated:
Abu Abdullah عليه السلام was asked about a man who performed Hajj as Ifrad (Hajj without Umrah). Can he perform Umrah after completing Hajj?
Imam عليه السلام said: "Yes, if the razor has touched his head (he has completed the rites of Hajj), then it is good."