Matthew 18:21

18:21 Then Peter came to him and said, “Lord, how many times must I forgive my brother who sins against me? As many as seven times?”

Matthew 22:25

22:25 Now there were seven brothers among us. The first one married and died, and since he had no children he left his wife to his brother.

tn Here the term “brother” means “fellow believer” or “fellow Christian” (cf. BDAG 18 s.v. ἀδελφός 2.a), whether male or female. Concerning the familial connotations, see also the note on the first occurrence of this term in v. 15.