Background
Abdallah bin Muhammad bin al-Qasim bin Abbas was a great-grandson of Imam al-Mahdi Abbas (d 1775).
Abdallah bin Muhammad bin al-Qasim bin Abbas was a great-grandson of Imam al-Mahdi Abbas (d 1775).
He was originally an imam of the prayer at the Qubbat Mahdi Abbas in San"a. In February 1837, the unqualified incumbent al-Mansur Ali II was deposed by the soldiery of San"a, since their salary was in arrears. Abdallah successfully made his da"wa (call for the immate) with the help of his partisans among religious students.
He took over at a time when the Yemeni lowlands or Tihamah were occupied by Egyptian troops.
The viceroy of Egypt, Muhammad Ali Pasha, sent an envoy to an-Nasir Abdallah and summoned him to surrender San"a to the Porte. This was politely refused.
After his accession he strove to deconstruct the legacy of ash-Shawkani. He introduced a strict legislation where the movements of women were restricted, as well as the use of musical instruments.
In 1840, an-Nasir Abdallah was murdered by his own servants in his country house.
In his stead, Sidi Muhammad was released from prison and raised to the imamate, under the name al-Hadi Muhammad.