1 Samuel 20:12

And Jonathan said to David , The Lord , the God of Israel , be witness ! When I have sounded out my father , about this time tomorrow , or the third day, behold , if he is well disposed toward David , shall I not then send and disclose it to you ?

Then Jonathan said to David, “I swear by the Lord, the God of Israel, that I will surely sound out my father by this time the day after tomorrow! If he is favorably disposed toward you, will I not send you word and let you know?

And Jonathan said unto David, O Lord God of Israel, when I have sounded my father about to morrow any time, or the third day , and, behold, if there be good toward David, and I then send not unto thee, and shew it thee;