"Whoever usurps even one span of land of somebody, its depth through the seven earths will be collared to his neck." (Saheeh Al-Bukhari, ‘Book of Oppression.’; sunnah.com)
"Whoever takes a piece of land of others unjustly, he will sink down the seven earths on the Day of Resurrection." (Saheeh Al-Bukhari, ‘Book of Oppression.’; sunnah.com)
The Prophet sallallaahu `alayhi wa sallam ( may Allaah exalt his mention ) said that the Prophet Nooh (Noah) may Allaah exalt his mention told his son: "I command you to stick to Laa ilaaha illallaah because if the seven heavens and the seven earths were put in one side of a scale and Laa ilaaha illallaah is put on the other side, Laa ilaaha illallaah will outweigh them."
Are these ahadith stating that there are seven Earths? Many scholars say this, as I have heard. Or are they saying that the Earth has seven layers? Some scholars say this, as I have heard.