the Paradise is for only young people

Holy Prophet Muhammed (saw) smiled often and would make jokes with members of his community. For example, An old woman came to our Holy Prophet Muhammed (saw) and said: "O Messenger of Allah, pray to Allah (Subhanahu Wa Ta'ala) that I will enter Paradise." Holy Prophet Muhammed (saw) said jokingly, "O Mother of so-and-so, no old women will enter Paradise." The old woman went away crying, after hearing from Holy Prophet Muhammed (saw). Then Holy Prophet Muhammed (saw) sent one of his companions to tell her that, she will enter Paradise by becoming a young lady, because the Paradise is for only young people.