It is narrated from Sayyiduna Zaid bin Arqam (may Allah be pleased with him), he says: During a journey, we stayed at a place with the Messenger of Allah (peace and blessings be upon him). He (peace and blessings be upon him) said: "Those from my Ummah who will come to me at the Pond of Kawthar, you are not even one hundred-thousandth of them." We asked Sayyiduna Zaid (may Allah be pleased with him): How many were you that day? He said: We were seven or eight hundred people.
Hadith Takhrij«اسناده ضعيف، ابو حمزة لم يرو عنه غير عمرو بن مرة، ولم يثبت توثيقه عمن يعتد به، أخرجه ابوداود: 4746، (انظر مسند أحمد ترقيم الرسالة: 19291 ترقیم بيت الأفكار الدولية: 19506»