God is not “permissive”, but neither is he unreasonable. Reasonable exceptions to general rules are peppered all across the pages of Holy Scripture. In Numbers 9 verses 1-3 for example, we read:
And the LORD spoke to Moses in the wilderness of Sinai, in the first month of the second year after they had come out of the land of Egypt, saying, 2 “Let the people of Israel keep the Passover at its appointed time. 3 On the fourteenth day of this month, at twilight, you shall keep it at its appointed…