Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: One night we talked a great deal in the presence of the Messenger of Allah (peace and blessings be upon him); then in the morning we came to him (peace and blessings be upon him), and he (peace and blessings be upon him) said: "The prophets were shown to me with their nations. A prophet would pass and with him would be a large group; a prophet and with him a band; a prophet and with him a few individuals; and a prophet with whom there was no one. Until Musa (peace be upon him) passed before me, and with him was a great throng of the Children of Israel, and they pleased me greatly. I asked: Who are these? It was said: This is your brother Musa, and with him are the Children of Israel. I asked: Then where is my Ummah? It was said: Look to your right. I looked, and the hills were filled with the faces of men. Then it was said to me: Look to your left. I looked, and the horizon was filled with the faces of men. Then it was said to me: Are you content? I said: I am content, O my Lord; I am content, O my Lord. Then it was said to me: Along with these there are seventy thousand (more) who will enter Paradise without reckoning."
The Prophet (peace and blessings be upon him) said: "May my father and mother be ransomed for you! If you are able to be among the seventy thousand, then do so; if you fall short, then be among the people of the hills; and if you fall short in that too, then be among the people of the horizon, for I saw some people crowding together." At this Sayyiduna Ukkashah bin Mihsan al-Asadi (may Allah be pleased with him) stood up and said: O Messenger of Allah! Pray for me that Allah makes me one of the seventy thousand. He (peace and blessings be upon him) prayed for him. Then another man stood up and said: O Messenger of Allah! Pray to Allah to make me one of them. He (peace and blessings be upon him) said: "Ukkashah has beaten you to it."
The narrator said: Then we began talking among ourselves and said: Who will these seventy thousand be? (It was said:) People who were born in Islam and remained upon it until they died. This reached the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "They are those who do not have themselves cauterised, do not seek ruqyah, do not take evil omens, and put their trust in their Lord."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9731