Article 31 dealt with the "Compulsory Acquisition of Property" and had two clauses:

Article 31A: This provided protection to laws that the government enacted to acquire land or property for agrarian reforms or other public welfare purposes. It stated that these laws would not be deemed void or unconstitutional on the grounds of violating the right to property.
Article 31B: This article validated certain acts and regulations that were included in the Ninth Schedule of the Constitution. The Ninth Schedule was created to protect laws from being challenged in courts on the grounds of violating fundamental rights, including the right to property.
However, the 44th Amendment to the Indian Constitution, passed in 1978, removed the right to property as a fundamental right, making it only a legal right. Subsequently, in 2007, the 44th Amendment was further amended, and Articles 31A and 31B were omitted from the Constitution, effectively ending their provisions.

Source: ChatGPT