וְעֹ֥֤שֶׂה חֶ֖֙סֶד֙ לַאֲלָפִ֑֔ים לְאֹהֲבַ֖י וּלְשֹׁמְרֵ֥י מִצְוֺתָֽי׃ (ס)
and showing mercy unto the thousandth generation of them that love Me and keep My commandments.
Read kabbalistic (mystical) interpretation of Exodus 20:6: and classical mystical sources.