וַיִּשְׂא֨וּ אֶת־עֵינֵיהֶ֤ם מֵרָחוֹק֙ וְלֹ֣א הִכִּירֻ֔הוּ וַיִּשְׂא֥וּ קוֹלָ֖ם וַיִּבְכּ֑וּ וַֽיִּקְרְעוּ֙ אִ֣ישׁ מְעִל֔וֹ וַיִּזְרְק֥וּ עָפָ֛ר עַל־רָאשֵׁיהֶ֖ם הַשָּׁמָֽיְמָה׃
Rashi on Job
but they did not recognize him because his face had changed as a result of the agonies.
Rashi on Job
towards heaven i.e., high over their heads. That was their mourning custom.