Not graded
Sunan ad-Darimi 374
أَخْبَرَنَا أَبُو عَاصِمٍ قَالَ زَعَمَ لِي سُفْيَانُ قَالَ كَانَ الرَّجُلُ لَا يَطْلُبُ الْعِلْمَ حَتَّى يَتَعَبَّدَ قَبْلَ ذَلِكَ أَرْبَعِينَ سَنَةً
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 374).