In the bible you will find one of the most intense friendships put to a test. First you have Saul and David as best friends through out many a battle during the wars. But Saul, like a lot of people today put himself before God when God had asked him to do something,Saul found himself on the other side of God. Blatantly disobeying God. God took the King position from Saul and made David King instead. It was on then. Saul turned very bitter towards David. He went as far as trying to kill David. So sad. Because they both loved and respected each other up until that point. Not only that but David befriended Saul's son Jonathan which made Saul even more jealous. Jonathan and David were very good friends. David looked out for Jonathan up until his death. Friendship when it is unconditional last a life time.
Then David fled from Naioth in Ramah and came and said before Jonathan,
“What have I done? What is my guilt? And what is my sin before your
father, that he seeks my life?” And he said to him, “Far from it! You
shall not die. Behold, my father does nothing either great or small
without disclosing it to me. And why should my father hide this from me?
It is not so.” 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.” Then Jonathan said to David, “Whatever you say, I will do for
you.” David said to Jonathan, “Behold, tomorrow is the new moon, and I
should not fail to sit at table with the king. But let me go, that I may
hide myself in the field till the third day at evening.