Jeremiah 35:7

neither shall ye build house, nor sow seed, nor plant vineyard, nor have any, in following any agricultural or horticultural pursuit, on account of which they might become settled in any one place; but all your days ye shall dwell in tents, leading a more or less nomadic life, like their forefathers before them, that ye, in obedience to their ancestor's command, may live many days in the land where ye be strangers; for, although living in the midst of Israel and Judah and having accepted the true God, the Rechabites maintained their own nationality.