הִנֵּ֤ה טְפָח֨וֹת ׀ נָ֘תַ֤תָּה יָמַ֗י וְחֶלְדִּ֣י כְאַ֣יִן נֶגְדֶּ֑ךָ אַ֥ךְ כָּֽל־הֶ֥בֶל כָּל־אָ֝דָ֗ם נִצָּ֥ב סֶֽלָה׃
Behold, Thou hast made my days as hand-breadths; and mine age is as nothing before Thee; surely every man at his best estate is altogether vanity. Selah
Read halakhic rulings (Jewish law) on Psalms 39:6: and classical halakhic sources.