It is narrated from Sayyiduna Abu Sa'd al-Khayr al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Seventy thousand of my Ummah will enter, and with every thousand there will be seventy thousand more. This will include our Muhajirun, and some of it will be completed for a group of our Bedouins."
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 18976