The Three Weeks

The Halachot of eating meat during the nine days.

We are waiting eagerly, especially during the three weeks, for the redemption and for the time of the Mashi'ach. How will things look at that time?

The Halachot that during the nine days by Rabbi Mordechai Eliyahu Zt"l.

We sold our home and have been renting because construction on our new apartment is not complete. Now, it is basically ready, but lacks a Tofes 4 (municipal permission to inhabit). If we get the Tofes 4 during the Nine Days, is it permitted to move in then?