Hebrews 13:3

Remember them that are in bonds, as bound with them, them that are as being yourselves also in the body.

Christians are commanded to identify with the imprisoned and remembering that, as long as one is subject to the limitations of the flesh, the misfortune that comes to others may come likewise to himself. The author had already admonished his readers concerning the imprisoned (Hebrews 10:33,34) and returned to the subject here for emphasis. Westcott believed that:

The character of the precepts suggest that the society to which they were addressed consisted of wealthy and influential members. The two special illustrations of the practical exhibition of "love to the brethren" point to services which such persons especially could render; and the warnings which follow regard the temptations of a similar class of luxury and love of money.[2]

If Westcott's deduction is allowed, it would account for the fact that, whereas some of the Christians had been imprisoned, some of the more influential had escaped such a persecution; hence the commandment for the more fortunate to identify with the less fortunate.