'Brook' in the Bible

When the servants of Absalom came to the woman [at] the house, they said, "Where are Ahimaaz and Jonathan?" And she said to them, "They crossed over the brook of water." So they searched but could not find them, so they returned to Jerusalem.

Why is my pain endless, and my wound incurable? It refuses to become healed. Truly you are to me like a deceitful [brook], waters [that] are not trustworthy.