Deuteronomy 15:19
All the firstling males that come of thy herd and of thy flock thou shalt sanctify unto the LORD thy God: thou shalt do no work with the firstling of thy bullock, nor shear the firstling of thy sheep.
All the firstling males that come of thy herd, or of thy flock, thou shalt sanctify unto the Lord thy God,.... According to the law in Exodus 13:2.
See Gill on "Exodus 13:2";
See Gill on "Exodus 13:12";
See Gill on "Exodus 13:13";
thou shalt do no work with the firstling of thy bullock: as to plough or tread out the corn with it, which were done with other heifers:
nor shear the firstling of thy sheep; nor was the wool shorn of it to be made use of; one of the Jewish canons runs thus,
"if any man weave an hand's breadth of the wool of a firstling into cloth, the cloth is to be burnt {l}.''
{l} Misn. Orlah, c. 3. sect. 3.