John Lightfoot on John 14:31

[Arise, let us go hence.] These words plainly set out the time and place wherein our Saviour had the discourse which is contained in this fourteenth chapter. The place was Bethany; the time, the very day of the Passover, when they were now about to walk to Jerusalem.

Those things which Christ had discoursed in chapter 13 were said two nights before the Passover; and that at Bethany, where Christ supped at the house of 'Simon the leper.' He abode there the day following, and the night after; and now, when the feast day was come, and it was time for them to be making towards Jerusalem to the Passover, he saith, Arise, let us go hence. What he did or said the day before the Passover, while he stayed at Bethany, the evangelist makes no mention. He only relates what was said in his last farewell before the paschal supper, and upon his departure from Bethany. All that we have recorded in chapters 15, 16, and 17, was discoursed to them after the paschal supper, and after that he had instituted the holy eucharist.