Tish'a Ushmonim Umeya - mi yodeya?

Question

Who knows one hundred eighty-nine?

Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:

• Upvote all interesting answers.

• Accept the best answer.

• Go on to the next number.

Answer 1

Based on the Raavad's figures, the era of the Rabbanan Savorai lasted 189 years, from 4260 to 4449. Though he then summarizes it as 187 years.

Answer 2

There are 189 words in the Aseret Hadibrot on the second luchot (Parsh Va'etchanan)