Reference for Psalms 103:12

כִּרְחֹ֣ק מִ֭זְרָח מִֽמַּֽעֲרָ֑ב הִֽרְחִ֥יק מִ֝מֶּ֗נּוּ אֶת־פְּשָׁעֵֽינוּ׃

As far as the east is from the west, So far hath He removed our transgressions from us.

ספר השרשים