Proof that Imamat (leadership with Divine Authority) Continues in the Descendents of the Preceding Imam but not through his Brother or Paternal Uncle or other such Relatives

4. Muhammad ibn Yahya has narrated from Muhammad ibn al Husayn from ‘Abd al-Rahman ibn abu Najran from Sulayman ibn Ja‘fari from Hammad ibn ‘Isa from abu ‘Abdallah عليه السلام who has said the following. “Imamat (Leadership with Divine Authority) does not take place in two brothers after al-Hassan and al-Husayn عليه السلام. It only continues in the descendents of the Imam عليه السلام generation after the generation.”