Sri Lanka said on Friday it was calling on Saudi Arabia to pardon a domestic worker sentenced to death by stoning after she admitted committing adultery while working in the Arab nation.An official from Sri Lanka's Foreign Employment Bureau said the married 45-year-old woman who was working as a maid in Riyadh since 2013 was convicted of adultery by a Saudi court in August.Her partner, also a Sri Lankan migrant worker, was given a lesser punishment of 100 lashes on account of being single."She has accepted the crime four times in the courts. But the Foreign Employment Bureau has hired lawyers and have appealed against the case," Upul Deshapriya, spokesman for the Foreign Employment Bureau, told the Thomson Reuters Foundation."The appeal is going on. Also from the foreign ministry side, they are in negotiation with the Saudi government on a diplomatic level."Officials from the Saudi Embassy in Colombo did not respond to requests from the Thomson Reuters Foundation on whether they would consider the plea for clemency.Oil-producing Saudi Arabia follows Sharia, or Islamic law, and is often criticized by human rights groups for the wide range of crimes such as adultery, drug smuggling and witchcraft which carry the death penalty.Stoning, a form of execution where a group throws stones at a person buried waist or chest deep in the ground until they are dead, is still carried out in parts of the Muslim world.