The last prince of the house of Saman, Montasir, a bold warrior and a poet of no mean talent, carried on for some years a kind of guerilla warfare against both Mahmud and the Ilek Khan, who had occupied Transoxiana, till he was assassinated in 1005 (395 A.H.).
In the year of his elevation to the Caliphate, he had regulated the succession to the empire in his own family by designating as future caliphs his three sons, al-Montasir billah (" he who seeks help in God"), al-Mo`tazz billah (" he whose strength is of God"), and al-Mowayyad billah (" he who is assisted by God").
The day had been fixed on which Montasir, Waif and several other Turkish generals were to be assassinated.
But Wasif and Montasir had been informed, and resolved to anticipate him.
- On the very night of his father's assassination Montasir had himself proclaimed caliph.
The Turkish soldiery, now the chief power in the state, chose, by the advice of Ibn Khasib, in succession to Montasir, his cousin Ahmad, who took the title of al-Mosta`in billala (" he who looks for help to God").