"Look unto the beasts of the field and learn their ways: when they awaken each morn, they look up to the heaven, and greet thy God, and in like manner offer prayer to their Creator. Nay, they complain not of anything, though they suffer much and hunger and thirst. These noble beasts rise above man in hidden qualities man knoweth not, and they teacheth man if man inquire. Learn ye the patience and courage of these beasts, who though they have no leader, tend to their needs and care for their young even as a good mother loveth her child."
The Feast of Weeks is called Shavuot, but biblically, this term technically refers to the preceding 7 weeks. The festival itself is called Yom haBikurim, the day of firstfruits. This can be somewhat confusing, because there are two Yomim haBikurim, the early and later First Fruits. The early FirstFruits marks the beginning of counting the 50 days toward the later FirstFruits, which is why later one is also called #pentecost, Greek for fifty.
Numbers 28:26-31
I've made a few videos on the Biblical holiday of #shavuot.