Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:100:10

And that within the breasts is obtained,  

and that which is in the breasts, the hearts, of disbelief or faith, is obtained, ˹when˺ it is revealed and examined,
القرآن:١٠٠:١٠

وَحُصِّلَ مَا فِي الصُّدُورِ  

{وحصِّل} بين وأفرز {ما في الصدور} القلوب من الكفر والإيمان.

See similar narrations below:

Collected by Qurʾān
quran:77:13

For the Day of Judgement.  

For the Day of Decision, for creatures (from this one may infer the response to ˹the clauses beginning with˺ idhā, ‘when’, in other words, ‘˹when …˺, the decision will be made for ˹all˺ creatures’).
القرآن:٧٧:١٣

لِيَوْمِ الْفَصْلِ  

{ليوم الفصل} بين الخلق ويؤخذ منه جواب إذا، أي وقع الفصل بين الخلائق.