2 Samuel 17:17-20

17Now Jonathan and Ahimaaz [the priests’ sons] were staying at En-rogel, and a maidservant [appearing to go for water] would go and tell them [what was happening], and they would go [secretly] and inform King David; for they could not [allow themselves to] be seen coming into the city [of Jerusalem].

18But a boy saw them and told Absalom; so the two of them left quickly and came to the house of a man in Bahurim, who had a well in his courtyard, and [with his permission] they went down into it.

19And the woman [of the house] took a covering and spread it over the mouth of the well and scattered grain on it; so nothing was discovered.

20Then Absalom’s servants came to the woman at the house and asked, “Where are Ahimaaz and Jonathan?” And the woman said to them, “They have crossed over the brook.” When they searched and could not find them, they returned to Jerusalem.