Deuteronomy 13:6

6 aIf your brother, the son of your mother, or your son or your daughter or bthe wife you embrace
Hebrew  the wife of your bosom
or your friend dwho is as your own soul entices you secretly, saying, ‘Let us go and serve other gods,’ ewhich neither you nor your fathers have known,

1 Samuel 18:3

3Then Jonathan made a covenant with David, because fhe loved him as his own soul.

1 Samuel 19:2

2And Jonathan told David, “Saul my father seeks to kill you. Therefore be on your guard in the morning. Stay in a secret place and hide yourself.

1 Samuel 20:17

17And Jonathan made David swear again by his love for him, gfor he loved him as he loved his own soul.

2 Samuel 1:26

26I am distressed for you, my brother Jonathan;
very pleasant have you been to me;
hyour love to me was extraordinary,
surpassing the love of women.

Proverbs 18:24

24A man of many companions may come to ruin,
but ithere is a friend who sticks closer than a brother.
Copyright information for ESV