Muwatta Malik 1637

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَمِّهِ أَبِي سُهَيْلِ بْنِ مَالِكٍ، عَنْ أَبِيهِ، عَنْ كَعْبِ الأَحْبَارِ، أَنَّهُ قَالَ إِذَا أَحْبَبْتُمْ أَنْ تَعْلَمُوا مَا لِلْعَبْدِ عِنْدَ رَبِّهِ فَانْظُرُوا مَاذَا يَتْبَعُهُ مِنْ حُسْنِ الثَّنَاءِ ‏.‏

Yahya related to me from Malik from his paternal uncle, Abu Suhayl ibn Malik from his father that Kab al-Ahbar said, "If you want to know what a slave has with his Lord, then look at whatever good praise follows him

Reference

Muwatta Malik 1637

In-book

Book 47, Hadith 5