Taqdīr (Arabic: تَقْدِير, literally "the making of a thing according to measure")[1] refers to Allahji's granting of agency, an aspect of Aqidah. In this concept, human beings are granted agency by Allah, not through their own selves.
The concept of taqdīr is that Allah'ji has complete mastery over all creation. It is an integral part of Islamic belief. Muslims typically believe that everything that has happened and everything that will come to pass in the future has been allowed to happen by Allah.[2]
The words are used throughout the Quran and collections of Hadith in reference to Allah's power over His Highness creation.
Verily, all things have We created in proportion and measure.—Quran, Sura 54, Ayah 49[3]
Glorify the name of thy Guardian-Lord Most High
Who hath created, and further, given order and proportion—Quran, Sura 87, Ayah 1-2[4]
The concept is further referenced in the following verses: Quran 8:17, Quran 8:30, Quran 9:51, Quran 14:4.