Qadr is divine destiny in Islam.

Qadar is the Arabic word for Destiny. Qada' is the Arabic word for Decree. They may or may not be used interchangebly depending on the context. Essentially, Destiny is what Allah has decreed. Allah has knowledge of everything in his creation. Nothing occurs except by his will. Human beings are given free will, and it must be made clear that destiny does not have a cause-and-effect influence of the choices humans make. The choices that humans make are all within Allah's knowledge.
The destiny of everything is recorded in Al-Lauh Al-Mahfuud (The Preserved Tablet). In an authentic hadith narrated by At-Tirmithee and Abu Dawuud, Prophet Muhammad said “Verily, the first thing Allah created was the pen. He said to it: ‘Write.’ It replied: ‘My Lord, what should I write?’ So He said: ‘Write all that will occur.’ So in that hour, everything that will occur until the Day of Recompense was recorded.” Another hadith indicates that this was 50,000 years prior to creation.