According as his hand shall attain unto - According to his ability, to what the providence of God has put in his hand, i.e., his power. This proportion of offerings is different from that prescribed by the Mosaic law, Numbers 15:4-12.
SDA Bible Commentary (limited)
Volume 1-7
7. Meat offering. See on Eze. 46:5. Compare Num. 28:11-15. There is a considerable increase in the requirements.