And God shall surely ascertain those who believe in their hearts and He shall surely ascertain the hypocrites and He will requite each group accordingly the lām in both verbs la-ya‘lamanna ‘He shall ascertain’ is for oaths.
- 29:1111
وَلَيَعْلَمَنَّ اللَّهُ الَّذِينَ آمَنُوا وَلَيَعْلَمَنَّ الْمُنَافِقِينَ
God will surely know the believers and know the hypocrites.
- common.revelation-Meccan
- common.hizb : 159