Rasulullah (sallallahu ‘alaihi wasallam) then addressed you by your kunyah (filial title) and said, “O Abu ‘Abdillah! There is no need for you to worry! Sit!” You thus sat, after which Rasulullah (sallallahu ‘alaihi wasallam) instructed, “Open your lap.” When you opened your lap before Rasulullah (sallallahu ‘alaihi wasallam), he filled it with musk and said, “Keep it with you and distribute it among my ummah.”
Hearing this dream, Imaam Maalik (rahimahullah) began to weep. After weeping for some time, Imaam Maalik (rahimahullah) remarked, “A dream is a glad tiding and a means of motivation, however it should not be a means of your retrogression (through you becoming complacent or boastful). If your dream is true, then the musk entrusted to me by Rasulullah (sallallahu ‘alaihi wasallam) refers to the knowledge of deen which Allah Ta‘ala has blessed me with.”
(Tazyeen-ul-Mamaalik pg. 39)