2 verses have
تَكُونُ
in Edition Uthmani / Al-Ma'aarij (The Ascending Stairways)

8:70يَوْمَ تَكُونُ ٱلسَّمَآءُ كَٱلْمُهْلِ

9:70وَتَكُونُ ٱلْجِبَالُ كَٱلْعِهْنِ