All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
First of all, it should be mentioned that the books of biographies and history prove that many companions who travelled to Greater
Similarly, Suhayl Ibn 'Amr travelled along with all his family, and there were many companions who did so. Nonetheless, if it is reported that a given companion travelled on his own without taking his family, there is no doubt that he had left for them a person who would take care of them and spend on them, until he returns.
Finally, it should be noted that knowing the answer to this question does not entail any action. What benefit would the questioner get from knowing such an answer? Rather, a Muslim should spend his time and effort in seeking knowledge which necessitates action and which would get him closer to Allaah. The companions were most knowledgeable about the obligations which Allaah required from them toward caring, providing for, and guarding the welfare of their families.
Allaah Knows best.