English: R. Abba bar Kahana said: All of them returned to curse except the synagogues and study-houses, as it is said, “And Hashem your God turned the curse into a blessing” — curse, and not curses.
Type of Learning
Scriptural precision (singular קללה) limiting which blessings remained permanent.
What Is Learned
Only the blessing over houses of Torah and prayer was never reversed — that is the blessing that endures.