Taharat Mishpacha : Marital Harmony

What is his reward if he causes the groom to rejoice? Rabbi Yehoshua ben Levi said: He is privileged to acquire the Torah, which was given with five voices, as it is stated: “And it was on the third day, when it was morning, there were sounds [kolot], and lightning and a thick cloud upon the mountain, and the voice of the shofar” (Exodus 19:16). The plural kolot indicates at least two sounds, while “the voice of the shofar” is one more. The passage continues: “And when the voice of the shofar grew louder and louder, Moses spoke and God answered him by a voice” (Exodus 19:19). Along with the three previous voices, the second shofar and the voice with which God answered Moses amount to a total of five voices at the revelation at Sinai.

Rabbi Abbahu said: The reward for causing a groom to rejoice is the same as if one had offered a thanks-offering in the Temple, for as it is stated later in the previously cited verse from Jeremiah: “Those who bring a thanks-offering to the house of the Lord.”
And Rav Naḥman bar Yitzḥak said: The reward for causing a groom to rejoice is the same as if one rebuilt one of Jerusalem’s ruins, as it is stated later in the same verse: “For I will restore the captivity of the land as it was in the beginning.”