"The Luchos had 21 ממי"ן סתומות (Mem Sofis) and 2 סמכי"ן .The Gematria = 960 same as
The Mogen Avraham writes, the reason we spill 16 times from the wine (Seder night)
because the sword of Hashem is called יו הך
The Chasam Sofer adds to this -The Shishim Giborim (60) are Mevatel from the Bnei Yisroel the Cherev.(16)
And even though the Mazik is a Beryah it is Batel with 960*
A Rosh Yeshiva sent in a letter to a Torah Journal called "Kerem Shlomo" (Bobov)
exclaiming in wonderment, because he found 22 ממי"ן סתומות (not 21)
He ends his letter "דו"ק ותשכח וצ"ע "
A Peleh on the Rosh Yeshiva and on the Journal.
see Rosh P. Gid Hanasha #33