When Saul saw David going 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 brethren, do not swear, either by heaven or by earth or with any other oath. But let your “Yes” be “Yes,” and your “No,” “No,” lest you fall into judgment.
“How shall I pardon you for this? Your children have forsaken Me And sworn by those that are not gods. When I had fed them to the full, Then they committed adultery And assembled themselves by troops in the harlots’ houses.
Then David took an oath again, and said, “Your father certainly knows that I have found favor in your eyes, and he has said, ‘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.”
And bring your youngest brother to me; so I shall know that you are not spies, but that you are honest men. I will grant your brother to you, and you may trade in the land.’ ”
Send one of you, and let him bring your brother; and you shall be kept in prison, that your words may be tested to see whether there is any truth in you; or else, by the life of Pharaoh, surely you are spies!”
Joseph saw his brothers and recognized them, but he acted as a stranger to them and spoke roughly to them. Then he said to them, “Where do you come from?” And they said, “From the land of Canaan to buy food.”