1 Samuel 20:17
And Jonathan caused David to swear again, by the love he had for him, for he loved him as he loved his own soul.
1 Samuel 18:1
And it came to pass, when he had ended speaking to Saul, that the soul of Jonathan was knit with the soul of David, and Jonathan loved him as his own soul.
1 Samuel 18:3
And Jonathan and David made a covenant, because he loved him as his own soul.
Deuteronomy 13:6
If thy brother, the son of thy mother, or thy son, or thy daughter, or the wife of thy bosom, or thy friend, who is to thee as thy soul, entice thee secretly, saying, Let us go and serve other gods (whom thou hast not known, thou, nor thy fathers;
2 Samuel 1:26
I am distressed for thee, my brother Jonathan: very pleasant wast thou unto me; Thy love to me was wonderful, passing women's love.
Proverbs 18:24
A man of many friends will come to ruin but there is a friend that sticketh closer than a brother.