ספירת העומר

(9) The LORD spoke to Moses, saying: (10) Speak to the Israelite people and say to them: When you enter the land that I am giving to you and you reap its harvest, you shall bring the first sheaf of your harvest to the priest. (11) He shall elevate the sheaf before the LORD for acceptance in your behalf; the priest shall elevate it on the day after the sabbath. ...(15) And from the day on which you bring the sheaf of elevation offering—the day after the sabbath—you shall count off seven weeks. They must be complete: (16) you must count until the day after the seventh week—fifty days; then you shall bring an offering of new grain to the LORD.

(3) Antigonos, man of Sokho, received from Shimon the Righteous. He would say, "Do not be as servants who are serving the master in order to receive a reward, rather be as servants who are serving the master not in order to receive a reward; and may the fear of Heaven be upon you."

(3)...And this sage had two students - one whose name was Tsadok and one whose name was Beitos. And when they heard him say this statement, they went out from in front of him and one said to his fellow, "Behold, the teacher said explicitly that there is no benefit and punishment for a person and there is no hope at all" - as they did not understand his intention. And one strengthened the hand of his friend and they exited the group and left the Torah. One group connected itself to one and another group to his fellow. And the sages called them Sadducees and Boethusians... And [so] each one said to his party that he believes in the Torah, but disagrees with the transmission [of its oral explanation] - that it is not true. And this was to exempt themselves from the accepted commandments and ordinances and decrees..... Since once the explanation was given to their choice, he was able to be lenient in what he wanted and to be strict in what he wanted....And from then these evil groups came out. And they are called Karaites in these lands - I mean to say, Egypt. And their names among the sages are Sadducees and Boethusians.