Matthew 5:18 KJV

For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law till it be fulfilled. Jot in Greek ee-o-tah- from the Hebrew origin, the 10Th letter of the Hebrew alphabet; "iota", the name of the8Th letter of the Greek alphabet, put(fig.) for a very small part of anything:-jot. Luke ch16 verse17 And it is easier for heaven and earth to pass, than one tittle of the law to fail. In Greek Ker-ah-yah something horn like i.e. spec, the apex of a Hebrew letter (fig. the least particle): - tittle

A tittle

The dot over the letter i is called tittle.

jot

1. An iota; a point; a tittle; the smallest particle.