The Book of Tobit 8:13 Maoni

Meanwhile, around the crowing of the rooster, Raguel, fearing that Tobias might have been killed by the demon, dug a grave with his servants; but when he soon learned of his safety, he ordered the grave to be filled again. The crowing of the rooster is the sound of the preachers, who, when they were proclaiming to the world that the morning and true day of faith would come after the darkness of error, there were some among the Gentiles who doubted whether the Lord had truly conquered the ancient enemy, and therefore thought it better to bury and hide the faith of His name; but afterwards, when they recognized the light of truth, as the dawn was advancing and the crowing of the rooster, that is, the voice of the doctors, became more frequent, who were accustomed to lift themselves up with the flight of an eager heart to heavenly desires, they drove away all the clouds of doubt from their minds, and truly recognized that Christ, having overthrown the enemy, is the spouse of the holy Church.