New Living Translation
Then Jonathan told David, “I promise by the LORD, the God of Israel, that by this time tomorrow, or the next day at the latest, I will talk to my father and let you know at once how he feels about you. If he speaks favorably about you, I will let you know.

American Standard Version
And Jonathan said unto David, Jehovah, the God of Israel, be witness : when I have sounded my father about this time to-morrow, or the third day, behold, if there be good toward David, shall I not then send unto thee, and disclose it unto thee?

Berean Study Bible
and Jonathan said, “By the LORD, the God of Israel, I will sound out my father by this time tomorrow or the next day. If he is favorable toward you, will I not send for you and tell you?

Douay-Rheims Bible
Jonathan said to David: O Lord God of Israel, if I shall discover my father's mind, to morrow or the day after, and there be any thing good for David, and I send not immediately to thee, and make it known to thee,

English Revised Version
And Jonathan said unto David, The LORD, the God of Israel, be witness; when I have sounded my father about this time tomorrow, or the third day, behold, if there be good toward David, shall I not then send unto thee, and disclose it unto thee?

King James Bible
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;

World English Bible
Jonathan said to David, "Yahweh, the God of Israel, [be witness]: when I have sounded my father about this time tomorrow, [or] the third day, behold, if there be good toward David, shall I not then send to you, and disclose it to you?

Young's Literal Translation
And Jonathan saith unto David, 'Jehovah, God of Israel -- when I search my father, about this time to-morrow or the third day, and lo, good is towards David, and I do not then send unto thee, and have uncovered thine ear --

1 Samuel 20:12 Additional Translations ...