Sahih Muslim , Book 43, Hadith 7178 (USC-MSA) ⓘ
Ibn Mas'ud said: Since our acceptance of Islam and the revelation of this verse in which Allah has shown annoyance to us:" Has not the time yet come for the believers that their hearts should be humble for the remembrance of Allah?" (lvii. 16), there was a gap of four years.
حَدَّثَنِي يُونُسُ بْنُ عَبْدِ الأَعْلَى الصَّدَفِيُّ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي عَمْرُو، بْنُ الْحَارِثِ عَنْ سَعِيدِ بْنِ أَبِي هِلاَلٍ، عَنْ عَوْنِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِيهِ، أَنَّ ابْنَ مَسْعُودٍ، قَالَ مَا كَانَ بَيْنَ إِسْلاَمِنَا وَبَيْنَ أَنْ عَاتَبَنَا اللَّهُ بِهَذِهِ الآيَةِ { أَلَمْ يَأْنِ لِلَّذِينَ آمَنُوا أَنْ تَخْشَعَ قُلُوبُهُمْ لِذِكْرِ اللَّهِ} إِلاَّ أَرْبَعُ سِنِينَ .
also referenced under: Book 56, Hadith 28 (In-Book) & Hadith 3027 (Reference)