כִּ֣י לֹ֥א שְׁא֛וֹל תּוֹדֶ֖ךָּ מָ֣וֶת יְהַלְלֶ֑ךָּ לֹֽא־יְשַׂבְּר֥וּ יֽוֹרְדֵי־ב֖וֹר אֶל־אֲמִתֶּֽךָ׃
For the nether-world cannot praise Thee, Death cannot celebrate Thee; They that go down into the pit cannot hope for Thy truth.
Read halakhic rulings (Jewish law) on Isaiah 38:18: and classical halakhic sources.