Reb Moishe Feinstein speaking in Toronto

Picture courtesy of Avina Seating

Parshas Vayeiro - Amazing Story From Reb Moishe Feinstein

HORAYOS 10b-11a

מנין שאין הקב"ה מקפח אפילו שכר שיחה נאה שאילו בכירה דקרייה מואב וכו' 

Lot's firstborn daughter named her child מואב thus recalling she bore him from her father.

Lot's second daughter named her child בן עמי which do not explicitly recall the child was from her father. For being more discreet than her older sister, she was rewarded.

In the Hakdama to the Igros Moshe (O.Ch.8 ) there is a very interesting story supposedly told by Reb Moshe zt"l:

Reb Moshe went to be מבקר חולה  in Luban a sick person whose tongue had swelled up.

He told Reb Moshe the reason why he contacted this disease.

He said he had a קושי'

"  How is it, that the משיח

will be an offspring of these women who were not even ashamed to name their children and publicize having relations with their

own father

One day he had a dream

Two elderly women came to him and claimed to be the daughters of Lot. They told him they heard his complaint and wanted to respond.

They said they could have easily claimed that the children were born by an immaculate conception and invent a new religion

.

They intentionally named them עמון ומואב

(embarrassing themselves) to publicize

that there is no such thing as an immaculate conception.

For this reason they were rewarded that the true משיח will come from them.

They also told him that he was being punished

for speaking badly about them.

After he finished telling the story to Reb Moshe he turned to the other side and died