וַיִּקְחוּ֙ אֶת־עַצְמֹ֣תֵיהֶ֔ם וַיִּקְבְּר֥וּ תַֽחַת־הָאֶ֖שֶׁל בְּיָבֵ֑שָׁה וַיָּצֻ֖מוּ שִׁבְעַ֥ת יָמִֽים׃ (פ)
And they took their bones, and buried them under the tamarisk-tree in Jabesh, and fasted seven days.
Read kabbalistic (mystical) interpretation of I Samuel 31:13: and classical mystical sources.