And this is the testimony of John. When the Jews from Jerusalem sent priests and Levites to him to ask him, “Who are you?” He admitted and did not deny it, but admitted, “I am not the Christ.” So they asked him, “What are you then? Are you Elijah?” And he said, “I am not.” “Are you the Prophet?” He answered, “No.” So they said to him, “Who are you, so we can give an answer to those who sent us? What do you have to say for yourself?” He said: “I am the voice of one crying out in the desert, ‘make straight the way of the Lord,’” as Isaiah the prophet said.” John 1
"Watch, therefore; you do not know when the lord of the house is coming, whether in the evening, or at midnight, or at cockcrow, or in the morning. May he not come suddenly and find you sleeping. What I say to you, I say to all: ‘Watch!’” Matthew 13