Shaykh Rabee Al-Madkhalee:
I will mention [something] from the etiquettes of Yahya Ibn Yahya An-Naysaabooree [in the path of seeking knowledge]:
He traveled from his city – Naysaaboor- to Imam Maalik, and took [i.e. studied, memorized etc] Al-Muwatta from him. After he finished Al-Muwatta, he stayed for a year. After he had finished Al-Muwatta, he was supposed to return to his country, [but] he stayed in Madeenah for a year and kept a close companionship with Imam Maalik.
Imam Maalik said to him, “why have you stayed even though you’ve [already studied, memorized] what you were seeking after?” He replied, “I want to learn Akhlaaq [manners] from you.
Al-Wasaaya Al-Manhajiyyah pg 512-51