Thabane, whose official term ends in 2022, said he was leaving office voluntarily and retiring due to old age.
“The job of Prime Minister requires sensory perception as well as rapid and physical strength. Due to my age, I am no longer as energetic as I used to be. As such, I have decided to voluntarily vacate office and hand over the reins of Government in accordance with the laws of Lesotho,” Thabane said.
Both the prime minister and his wife have not spoken publicly about the allegations.
In the statement announcing his planned exit, Thabane appealed 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 as well as marshal our country to lasting peace and prosperity,” Thabane said.