at any time

You also must be ready all the time, for the Son of Man will come when least expected.”

Luke 12:40 NLT

Jesus told a parable about a home-owner who was broken in to by a theif.  He then said, "if the home owner knew what time the theif would break in he could take measures to prevent it."

He also told another about the wise and foolish virgins who were waiting for the bridegroom to come to the wedding feast.5 took extra oil, 5 didn't. When the bridegroom was delayed the lamps were running out, and so the foolish asked the wise for some of their oil, however, the wise refused telling the foolish to go buy oil. When the foolish returned the door was shut and they were refused admittance. (Matt 25:1-13).

We must be constantly vigilant.  The Lord can come at any time. He warned it will be when we least expect it. We must be on guard! Having oil is having a vital, living and connected relationship with the Lord. Amen!