Strong’s Greek
G2436 — hileos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἵλεως
hileos — pronounced hil'-eh-oce
perhaps from the alternate form of 138; cheerful (as attractive), i.e. propitious; adverbially (by Hebraism) God be gracious!, i.e. (in averting some calamity) far be it:--be it far, merciful. see GREEK for 138
2 occurrences in the KJV.
Matthew 16:22
Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee.
Hebrews 8:12
For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.