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?
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.