There's not much background to this question. Did the Buddha ever receive a teaching after his enlightenment; a teaching that he accepted and made use of, either his own or another - or perhaps a teaching from another being other than a human.
Please provide sutta references.
I'm asking because of this term commonly found near or at the end of suttas: 'the job has been done, there is nothing more for this world'
Another way to put it: can one be independent of the teachings? If not, what situations would call forth the remembering and practising of the teachings for an enlightened mind?
Thanks
ADDITIONAL EDIT:
In my quest to answer this question I had found a sutta in which the Buddha had asked Venerable Mahacunda to give him a teaching on the enlightenment factors. You can read it here.
Also, the second part of the question is answered here which references this sutta here.