'Wool' in the Bible

All the first males to come to birth in your herd and your flock are to be holy to the Lord your God: the first birth of your ox is not to be used for work, the wool of your first lamb is not to be cut.

And in addition you are to give him the first of your grain and wine and oil, and the first wool cut from your sheep.

Do not have clothing made of two sorts of thread, wool and linen together.