The verse says...

The verse says: “Then, after him, We sent messengers to their People; they brought them the clear evidences...” However, none of them any longer believed in what their divinely guided forefathers had believed. Just like the idol worshippers before them, they were also rebellious and stood in opposition to Divine guidance.

The verse continues saying: “…but they would not believe in what they had already rejected beforehand...” The holy phrase saying: ‘Thus do We seal the hearts of the transgressors’ means that Allah (s.w.t.) impresses the symbol of infidelity upon the hearts of those who do injustice against themselves and violate the Divine limits and laws laid down by the Almighty, so that they become condemned to reprimand, and are recognized by the angels.

The verse says: “…Thus do We seal up the hearts of the transgressors.” Surah Yunus – Verse 75 ثُمَّ بَعَثْنَا مِن بَعْدِهِم مُوسَي وَهَ