تَكُنْ

Appears 4 times in the Quran. (Root: كون)
  1. Surely (as for) those whom the angels cause to die while they are unjust to their souls, they shall say: In what state were you? They shall say: We were weak in the earth. They shall say: Was not Allah's earth spacious, so that you should have migrated therein? So these it is whose abode is hell, and it is an evil resort

  2. They do not wait aught but that the angels should come to them, or that your Lord should come, or that some of the signs of your Lord should come. On the day when some of the signs of your Lord shall come, its faith shall not profit a soul which did not believe before, or earn good through its faith. Say: Wait; we too are waiting.

  3. Were not My communications recited to you? But you used to reject them.

  4. As to those who disbelieved: What! were not My communications recited to you? But you were proud and you were a guilty people.