BahÃ ` u 'll Ã h called him the `` Expounder '' of his word , meaning that only ` Abdu ` l-Bah Ã had the right to say what BahÃ ` u 'll Ã h 's writings mean . This was to prevent different people from splitting the religion up because they thought BahÃ ` u 'll Ã h meant different things , the way many other religions have split up . His first action after his freedom was to visit the Shrine of BahÃ ` u 'll Ã h in Bahji .