Again you will surely see it — repeated for emphasis — with the eye of certainty ‘ayna is a verbal noun as both ra’ā and ‘āyana have the same meaning.
- 102:77
ثُمَّ لَتَرَوُنَّهَا عَيْنَ الْيَقِينِ
Then you will see it with the eye of certainty.
- common.revelation-Meccan
- common.hizb : 240