Wilson's Dictionary of Bible Types
Luke 11:5 (c) The term describes the deep perplexity and distress of a soul that has come to the end of his resources and is in soul trouble about his path and his future. It represents the man or the woman who calls at your door selling some article, but in his heart there is conviction of sin, and a realization of his need. You are supposed to have the Bread of Life to give to him in his deep distress.
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Watson, Walter. Entry for 'Midnight'. Wilson's Dictoinary of Bible Types. https://www.studylight.org/dictionaries/eng/wdt/m/midnight.html. 1957.