Fifty days after Pesah is the holiday of Shabu'oth. On this day (outside the Land of Israel, the holiday lasts two days), we commemorate and celebrate that God gave the Torah to the Jewish people. While each nation can have a relation to the Creator, the Torah contains the way on which Jews have their own special relationship with God.
The evening service starts with the reading of Psalm 68
The First Day
On the First Day of Shabhu'ot, immediately after the morning prayer, we read the entire Hallél (Ps. 113-118), part of it is sung to the following Shabhu'oth melody.
According to the Book of Exodus, the first part of the Torah that was revealed to the people of Israel was the Ten Pronouncements, more popularly known as the Ten Commandments. On Shabu'oth, the Ten Commandments are read in synagogue. This recording reflects the Western-Sephardi tradition that reads the Ten Commandments in a special tune called the "High Na'oom", or the "High Tune". Only very few parts of the Torah are read in this manner.
On the first day of Shabhu'oth, we read from the Book of Exodus, chapters 19 and 20.
The Second Day
On the Second Day of Shabhu'ot, after morning prayer, we read the Hallél, sung to another holiday melody.
On the second day of Shabhu'oth (if it falls on a weekday), we read Deuteronomy 15:19-16:17
However, if the second day of Shabhu'oth falls on a Shabbat, we read Deuteronomy 14:22-16:17
Also on Shabhu'oth, at the end of the service or in the afternoon, we read the Book of Ruth.