New King James Version (NKJV)
“48 Therefore you shall be perfect, just as your ‘Father’ [Ab: Principal, Chief, etc..] in heaven is perfect.”
Strong’s Hebrew Lexicon:
Father: 1 ‘ab awb a primitive word; father, in a literal and immediate, or figurative and remote application):–chief, (fore-)father(-less), X patrimony, principal. Compare names in “Abi-“.