The Bride and Groom
6. The Sages said: "It is considered wrong for a person to enjoy a wedding feast without bringing joy to the bride and groom." Conversely, someone who brings joy to the bride and groom merits the wisdom of Torah. He is compared to someone who offers a thanksgiving sacrifice in the Temple and rebuilds Jerusalem from its ruins.
According to some opinions, even someone who is merely at a place where a wedding is being held and does not take part in the meal is nevertheless obligated to join in the rejoicing.
*** In the town of Elkost, near Kovno, there lived a young man who decided to leave his job and devote himself entirely to Torah study. Until then, he had plastered and painted walls and had never studied, but now the synagogue became his workplace. He studied Torah every day, and several pious women brought him food. After some time, a shidduch was proposed for the young man, and the wedding was to take place in another town. Rabbi Yitzchak Blazer made a special trip to attend this wedding. When the local rabbi saw Rabbi Yitzchak, he was very surprised. Noticing the rabbi's surprise, the distinguished guest explained: "In this case, the mitzvah of 'gemilut chasadim' (helping others) is very great. We cannot even imagine the merit it brings a person."
When Rabbi Blazer returned home, he was told that his child had put a coin in his mouth and it had become lodged in his throat. The doctors had tried to find a way to remove it or push it down, but all their efforts had been in vain. Then suddenly, to everyone's surprise, even before Rabbi Yitzchak arrived, the child swallowed the coin on his own, and everything ended well. When the father was told what had happened, he immediately connected it with his decision to attend the wedding. The rabbi was certain that the mitzvah of "gemilut chasadim" he had performed had saved his child.