Luke 12:36-38

36Then you will be like servants waiting for their master to return from the wedding banquet, so that when he comes and knocks, they can open the door for him at once. 37Blessed are those servants whom the master finds on watch when he returns. Truly I tell you, he will dress himself to serve and will have them recline at the table, and he himself will come and wait on them. 38Even if he comes in the second or third watch of the night1 and finds them alert, those servants will be blessed.