וּדְע֗וּ כִּֽי־הִפְלָ֣ה יְ֭הוָה חָסִ֣יד ל֑וֹ יְהוָ֥ה יִ֝שְׁמַ֗ע בְּקָרְאִ֥י אֵלָֽיו׃
But know that the LORD hath set apart the godly man as His own; The LORD will hear when I call unto Him.
Read halakhic rulings (Jewish law) on Psalms 4:4: and classical halakhic sources.