Strong's Concordance G2503

Original Word: ἰῶτα
Transliteration: iōta
Phonetic Spelling: ee-o'-tah
[ἰῶτα] of Hebrew origin (the tenth letter of the Hebrew alphabet); "iota", the name of the eighth letter of the Greek alphabet, put (figuratively) for a very small part of anything

Usages throughout the bible

Matthew 5:18 - For verily I say unto you, Till heaven and earth pass, one jot G2503 or one tittle shall in no wise pass from the law, till all be fulfilled.