Hiranyakasipu wanted to receive a benediction from Lord Brahma so that in the future he would be able to conquer Lord Brahma's abode. Similarly, another demon received a benediction from Lord Siva but later wanted to kill Lord Siva

Expressions researched:
"Hiraṇyakaśipu wanted to receive a benediction from Lord Brahmā so that in the future he would be able to conquer Lord Brahmā's abode. Similarly, another demon received a benediction from Lord Śiva but later wanted to kill Lord Śiva through that same benediction"

Srimad-Bhagavatam

SB Canto 7

Such are the goals of the austerities performed by demons. Hiraṇyakaśipu wanted to receive a benediction from Lord Brahmā so that in the future he would be able to conquer Lord Brahmā's abode. Similarly, another demon received a benediction from Lord Śiva but later wanted to kill Lord Śiva through that same benediction.

SB 7.3.1, Translation and Purport

Nārada Muni said to Mahārāja Yudhiṣṭhira: The demoniac king Hiraṇyakaśipu wanted to be unconquerable and free from old age and dwindling of the body. He wanted to gain all the yogic perfections like aṇimā and laghimā, to be deathless, and to be the only king of the entire universe, including Brahmaloka.

Such are the goals of the austerities performed by demons. Hiraṇyakaśipu wanted to receive a benediction from Lord Brahmā so that in the future he would be able to conquer Lord Brahmā's abode. Similarly, another demon received a benediction from Lord Śiva but later wanted to kill Lord Śiva through that same benediction. Thus self-interested persons, by demoniac austerity, want to kill even their benedictors, whereas the Vaiṣṇava wants to remain an ever-existing servant of the Lord and never to occupy the post of the Lord. Through sāyujya-mukti, which is generally demanded by asuras, one merges into the existence of the Lord, but although one sometimes thus achieves the goal of the theory of monism, one falls down again to struggle in material existence.