John Calvin's Bible Commentary
Jeremiah 35:8
Jeremiah explains at large what might have been expressed in few words, in order to amplify the constancy of the Rechabites. For one may obey his father, and yet be not so fixed in his purpose, but that he might on some slight occasion fail in his duty. Jeremiah here shews that such was the prompt perseverance of the Rechabites, that they could not be enticed by having wine set before them; but that as though no temptation had been presented to them, they kept the commandment of their father, who, at the same time, had been dead, as it has already appeared, some ages before.
They then said, that they hearkened to the voice of Jonabab the son of Rechab, their father; and also added, according to all the things which he has commanded us tle again relates what Jonadab had commanded, and to this belongs the sentence, According to all things, etc. For had he ordered them only to be abstemious, to obey would not have been difficult or hard; he designed to bind them to a wandering life, that they might be covered only by tents, and that they might not possess anything. As then Jonadab did not in one thing only try the obedience of his family, it appears more clearly how great was their promptitude and perseverance in obeying.
They then said, first, that they were not to drink wine; and also added, all their days We indeed know that the Nazarites were forbidden to drink wine, but it was only for a time, until they had performed their vow; we also know, that when the priest was discharging his duty, he was not allowed, for that time, to take wine. But afterwards the priests as well as the Nazarites, resumed their common mode of living. But to taste no wine throughout life was a thing far more difficult. The Prophet, no doubt, detailed these particulars, that he might load the Jews with greater disgrace, who, in a matter the most just, and by no means hard, were not, as we shall see, obedient to God. They said, We, our wives, our sons, our daughters, as though they had said, “This precept has ever been observed in our family; and what has been delivered to us, by our fathers, we have followed to this day, as also our fathers, who obeyed the command of a dead man, because his will had been explained to them.”