1 Timothy 5:3

That all widows that are approved are to be held in honour. In the first Epistle of Paul to Timothy: "Honour widows which are truly widows. But the widow that is wanton, is dead while she liveth." And again: "But the younger widows pass by: for when they shall be wanton in Christ, they wish to marry; having judgment, because they have cast off their first faith."

"Honor widows, that are widows indeed." Why does he say nothing of virginity, nor command us to honor virgins? Perhaps there were not yet any professing that state, or they might have fallen from it. "For some," he says, "are already turned aside after Satan." For a woman may have lost her husband, and yet not be truly a widow. As in order to be a virgin, it is not enough to be a stranger to marriage, but many other things are necessary, as blamelessness and perseverance; so the loss of a husband does not constitute a widow, but patience, with chastity and separation from all men. Such widows he justly bids us honor, or rather support. For they need support, being left desolate, and having no husband to stand up for them. Their state appears to the multitude despicable and inauspicious. Therefore he wishes them to receive the greater honor from the Priest, and the more so, because they are worthy of it.

[Paul] is training a church still untaught in Christ and making provision for people of all stations but especially for the poor, the charge of whom has been committed to himself and Barnabas. Thus he wishes only those to be supported by the exertions of the church who cannot labor with their own hands and who are widows indeed, approved by their years and by their lives.

Above, he instructed Timothy on the use and abstinence from foods; here he instructs him on the distribution of foods to spiritual persons, namely, the foods dispensed to widows and teachers: first, therefore, he instructs him concerning widows; second, concerning teachers, at let the priests …

Why does he say nothing about virgins? Perhaps because there were none of them there yet. He commands to honor widows because they do not have husbands who would advocate for them, and their very condition seemed shameful and worthy of reproach. Therefore they should …

Honour widows that are widows indeed. Who those are, see in 1Ti 1:

Honour widows - The particular attention and respect which are enjoined here, seem to refer to the class of widows who were supported by the church, and who were entrusted with the performance of certain duties toward the other female members, see 1Ti 5:

Those really desolate; not like those (1Ti 5:4) having children or relations answerable for their support, nor like those (in 1Ti 5:6) "who live in pleasure"; but such as, from their earthly desolation as to friends, are most likely to trust wholly in God, persevere in continual prayers, and carry out the religious duties assigned to Church widows (1Ti 5:5).

Honor widows that are widows indeed - One meaning of the word τιμαω, to honor, is to support, sustain, etc., Mat 15:4, Mat 15:5; and here it is most obviously to be taken in this sense. Provide for those widows especially which are widows indeed - persons truly destitute, being aged and helpless, and having neither children nor friends to take care of them, and who behave as becometh their destitute state. But see the note on 1Ti 5:10.