וַיֹּ֨אמֶר אֵלָ֜יו אַל־תִּירָ֗א כִּ֠י לֹ֤א תִֽמְצָאֲךָ֙ יַ֚ד שָׁא֣וּל אָבִ֔י וְאַתָּה֙ תִּמְלֹ֣ךְ עַל־יִשְׂרָאֵ֔ל וְאָנֹכִ֖י אֶֽהְיֶה־לְּךָ֣ לְמִשְׁנֶ֑ה וְגַם־שָׁא֥וּל אָבִ֖י יֹדֵ֥עַ כֵּֽן׃
And he said unto him: ‘Fear not; for the hand of Saul my father shall not find thee; and thou shalt be king over Israel, and I shall be next unto thee; and that also Saul my father knoweth.’
Pirkei Avot
All love that depends on a something, [when the] thing ceases, [the] love ceases; and [all love] that does not depend on anything, will never cease. What is an example of love that depended on a something? Such was the love of Amnon for Tamar. And what is an example of love that did not depend on anything? Such was the love of David and Jonathan.