The LORD = Jehovah. Quoted from Exo_34:6; Exo_20:5 with Exo_34:7.
mercy = lovingkindness, or grace.
iniquity. Hebrew. 'avah.App-44.
transgression. Hebrew. pasha.App-44. Some codices, with Samaritan Pentateuch, The Targum of Jonathan ben Uzziel and Septuagint, read "transgression and sin", as in Exo_34:7.