spiritual transaction

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ هَلْ أَدُلُّكُمْ عَلَىٰ تِجَـٰرَةٍ تُنجِيكُم مِّنْ عَذَابٍ أَلِيمٍ

O you who have believed, shall I guide you to a transaction that will save you from a painful punishment?