וַיִּ֥פֶן אַחֲרָ֖יו וַיִּרְאֵ֑נִי וַיִּקְרָ֣א אֵלָ֔י וָאֹמַ֖ר הִנֵּֽנִי׃
And when he looked behind him, he saw me, and called unto me. And I answered: Here am I.
Read kabbalistic (mystical) interpretation of II Samuel 1:7: and classical mystical sources.