Thabane, whose official term ends in 2022, said he left the office voluntarily and retired due to old age.
“The work of the Prime Minister requires sensory perception and physical strength and is fast. Because of my age, I am no longer as energetic as I used to be. Thus, I have decided to voluntarily vacate the office and hand over control of the Government in accordance with the Lesotho law,” Thabane said.
Both the prime minister and his wife have not spoken publicly about the allegations.
In a statement announcing his planned exit, Thabane called for unity in the mountain kingdom, saying his decision to leave should not be used to score political points.
“To my colleagues in the political arena, this is not the time to divide our nation. This is the time for us to join hands and build our institutions and also set our country for lasting peace and prosperity,” said Thabane.