Narrated Qatada:

I asked Anas how many times the Prophet had performed 'Umra. He replied, "Four times. 1. 'Umra of Hudaibiya in Dhi-l-Qa'da when the pagans hindered him;
2. 'Umra in the following year in Dhi-l-Qa'da after the peace treaty with them (the pagans),
3. 'Umra from Al-Jr'rana where he distributed the war booty." I think he meant the booty (of the battle) of Hunain. I asked, "How many times did he perform Hajj?" He (Anas) replied, "Once. "

حَدَّثَنَا حَسَّانُ بْنُ حَسَّانٍ، حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، سَأَلْتُ أَنَسًا ـ رضى الله عنه ـ كَمِ اعْتَمَرَ النَّبِيُّ ﷺ قَالَ أَرْبَعٌ عُمْرَةُ الْحُدَيْبِيَةِ فِي ذِي الْقَعْدَةِ، حَيْثُ صَدَّهُ الْمُشْرِكُونَ، وَعُمْرَةٌ مِنَ الْعَامِ الْمُقْبِلِ فِي ذِي الْقَعْدَةِ، حَيْثُ صَالَحَهُمْ، وَعُمْرَةُ الْجِعْرَانَةِ إِذْ قَسَمَ غَنِيمَةَ أُرَاهُ حُنَيْنٍ. قُلْتُ كَمْ حَجَّ قَالَ وَاحِدَةً.