1 Samuel 18:3

3 And Jonathan and David made a bond of peace; for Jonathan loved David as his own soul; (And Jonathan and David made a covenant; for Jonathan loved David as much as he loved his own life;)

1 Samuel 18:3 Meaning and Commentary

1 Samuel 18:3

Then Jonathan and David made a covenant
A covenant of friendship; entered into a solemn agreement to keep up and maintain a cordial respect to each other, and to support each other's interest both in life and after death, whoever was the survivor; and in consequence of this David had a friend at court, when Saul fell out with him, and who pleaded his cause, and discovered his father's plots, and was the means of preserving David's life:

because he loved him as his own soul;
so that this covenant was not founded in mere words, but in sincere and cordial affection, and was lasting and inviolable.

1 Samuel 18:3 In-Context

1 And it was done, when David had ended to speak to Saul, the soul of Jonathan was glued together to the soul of David, that is, (they were) joined together by the glue of charity, (or of love,) that may not be broken, and Jonathan loved him as his own soul (and Jonathan loved him as much as he loved his own life).

2 And Saul took David in that day, and granted not to him, that he should turn again into the house of his father. (And from that day on, Saul kept David with him, and would not allow him to return to his father's house.)

3 And Jonathan and David made a bond of peace; for Jonathan loved David as his own soul; (And Jonathan and David made a covenant; for Jonathan loved David as much as he loved his own life;)

4 for why Jonathan unclothed himself from the coat that he was clothed in, and he gave it to David, and his other clothes, unto his sword and his bow, and unto his girdle.

5 And David went forth to all things, to whatever things Saul sent him, and he governed himself prudently; and Saul setted him over the men of battle, and he was accepted in the eyes of all the people, and mostly in the sight of the servants of Saul (and even before Saul's officers).