Qadar, in Islamic belief, refers to Allah’s decreeing of everything that occurs in the universe, based on His prior knowledge and wisdom. It encompasses several fundamental aspects:

1. All-Encompassing Knowledge**: Allah knows all things, from the general to the specific, including His own actions and those of His creation. This knowledge spans eternity and is recorded in the Preserved Tablet (Al-Lawh Al-Mahfuz).
2. Written Decrees**: Allah has inscribed all that will occur in Al-Lawh Al-Mahfuz, as affirmed in the Quran and Hadith.
3. Divine Will**: Every event, action, and occurrence happens solely by the will of Allah, whether it pertains to His actions or those of His creatures.
4. Creator of All Things**: Allah is the creator of everything, encompassing their essence, attributes, and movements.

Belief in Qadar does not negate human free will, as individuals are endowed with the ability to choose their actions within their capacity. This is evident in both religious teachings and everyday life. However, human will is subject to Allah’s overarching will and decree.

In summary, Qadar underscores Allah’s supreme knowledge and control over all creation, while acknowledging the coexistence of human free will within the framework of His divine plan.