Does the husband's saying to his wife: "There will be no travel, do you hear? And if you travel, I will send you your paper," or "If you travel, I will send you your paper," constitute a contingent divorce if the wife travels thereafter?

The husband's statement to his wife: "If you travel, I will send you your divorce paper" is an idiomatic expression that implies divorce, but divorce does not occur by it unless he intends it. If he intends divorce by it, then divorce occurs upon the wife's travel. But if he intends a promise or something other than divorce, then nothing occurs. The wife must obey her husband and not leave his house or travel without his permission.