Oholoth chap. 18, mish. 10.

“An Ammonite or Moabite shall not enter the congregation of the Lord, even to the tenth generation,” etc. (Deut. xxiii. 4).  One day Yehuda, an Ammonite prophet, came into the academy and asked, “May I enter the congregation (if I marry a Jewess)?” Rabban Gamliel said unto him, “Thou art not at liberty to do so;” but Rabbi Joshua interposed and maintained, “He is at liberty to do so.”  Then Rabban Gamliel appealed to Scripture, which saith, “An Ammonite or Moabite shall not enter into the congregation of the Lord, even to the tenth generation.”  To this Rabbi Joshua retorted and asked, “Are then these nations still in their own native places?  Did not Sennacherib, the king of Assyria, transplant the nations? as it is said (Isa. x. 13), ’I have removed the bounds of the people, and have robbed their treasures, and have put down the valor of the inhabitants.’” Rabban Gamliel replied, “Scripture saith (Jer. xlix. 6), ’Afterward I will bring again the captivity of the children of Ammon,’ and so,” he argued, “they must have already returned.”  Rabbi Joshua then promptly rejoined, “Scripture saith (Jer. xxx. 3), ’I will bring again the captivity of my people Israel and Judah,’ and these have not returned yet.”  And on this reasoning the proselyte was permitted to enter the congregation.

Yadayim, chap. 4, mish. 4.

Go and learn from the tariff of donkey-drivers, ten miles for one zouz, eleven for two zouzim.

Chaggigah, fol. 9, col. 2.

When Israel went up to Jerusalem to attend the festivals, they had to stand in the Temple court closely crowded together, yet when prostrated there was a wide space between each of them (Rashi says about four ells), so that they could not hear each other’s confession, which might have caused them to blush.  They had, however, when prostrated, to extend eleven ells behind the Holy of Holies.

Yoma, fol. 21, col. 1,

In the days of Joel, the son of Pethuel, there was a great dearth, because (as is said in Joel i. 4) “That which the palmerworm hath left hath the locust eaten,” etc.  That year the month of Adar (about March) passed away and no rain came.  When some rain fell, during the following month, the prophet said unto Israel, “Go ye forth and sow.”  They replied, “Shall he who has but a measure or two of wheat or barley eat and live or sow it and die?” Still the prophet urged, “Go forth and sow.”  Then they obeyed the prophet, and in eleven days the seed had grown and ripened; and it is with reference to that generation that it is said (Ps. cxxvi. 5), “They that sow in tears shall reap in joy.”

Taanith fol. 5, col. 1.

What is a female in her minority?  One who is between eleven years and one day, and twelve years and one day.  When younger or older than these ages she is to be treated in the usual manner.

Yevamoth, fol. 100, col. 2.