King James Bible

JOT, noun [ Heb. yod.] An iota; a point; a tittle; the least quantity assignable.

Till heaven and earth pass, one jot or one title shall in no wise pass from the law till all shall be fulfilled. Matthew 5:18.

A man may read much, and acquire not a jot of knowledge, or be a jot the wiser.

JOT, verb transitive To set down; to make a memorandum of.