TSK
Treasury of Scripture Knowledge references in WEB.
"Speak to the children of Israel, and tell them, 'When you have come into the land which I give to you, and shall reap its the harvest, then you shall bring the sheaf of the first fruits of your harvest to the priest:
"'Also in the day of the first fruits, when you offer a new meal offering to Yahweh in your [feast of] weeks, you shall have a holy convocation; you shall do no servile work;
You shall keep the feast of weeks to Yahweh your God with a tribute of a freewill offering of your hand, which you shall give, according as Yahweh your God blesses you: