As soon as Saul saw David go out against the Philistine, he said to Abner, the commander of the army, "Abner, whose son is this youth?" And Abner said, "As your soul lives, O king, I do not know."
But above all, my brothers, do not swear, either by heaven or by earth or by any other oath, but let your "yes" be yes and your "no" be no, so that you may not fall under condemnation.
"How can I pardon you? Your children have forsaken me and have sworn by those who are no gods. When I fed them to the full, they committed adultery and trooped to the houses of whores.
But David vowed again, saying, "Your father knows well that I have found favor in your eyes, and he thinks, 'Do not let Jonathan know this, lest he be grieved.' But truly, as the LORD lives and as your soul lives, there is but a step between me and death."
Bring your youngest brother to me. Then I shall know that you are not spies but honest men, and I will deliver your brother to you, and you shall trade in the land.' "
Send one of you, and let him bring your brother, while you remain confined, that your words may be tested, whether there is truth in you. Or else, by the life of Pharaoh, surely you are spies."
Joseph saw his brothers and recognized them, but he treated them like strangers and spoke roughly to them. "Where do you come from?" he said. They said, "From the land of Canaan, to buy food."