Is there a Hindu Scripture that prescribes monogamy?

Question

Polygamy in Vedas

Krishna Yajur Veda 6.5.1.4

therefore as one goes many follow; therefore one becomes superior among many; therefore one wins many wives

Polygamy in Ithihas:

Mahabharata Adi Parva 1.160.36

There is no sin in this. For a man polygamy is an act of merit, but for a woman it is very sinful to betake herself to a second husband after the first.

Mahabharata Anusasana Parva 13.47

It has been laid down, O grandsire, that a Brahmana can take four wives, viz., one that belongs to his own order, one that is a Kshatriya, one that is a Vaisya, and one that is a Sudra, if the Brahmana wishes to indulge in the desire of sexual intercourse.

Many smritis allow Brahmin to have 4 wives, for a Kshatriya three, for a Vaishya 2 and for Shudra one. Now, is there any scripture which condemn polygamy?

Answer 1

Polygamy for men is allowed :

But there are very strict rules - regarding how many wives, the order of varna to marry in order to avoid varna-sankara (a higher varna man can marry a lower varna woman, but not other way), how to treat them (go to naraka if one wife is given preference over other), how to divide wealth of inheritance for sons (according to both varna & seniority) etc. And polygamy is illegal in many countries nowadays.

For women it is not allowed :

Once is the partition of the inheritance made, once is a maiden given in marriage, and once does a man say,' I will give; each of those three acts is done once only.

Full detail here - http://www.sacred-texts.com/hin/manu/manu09.htm

Answer 2

Polygamy was allowed. Hence a man may marry multiple women.

The rule of thumb is -- A man can marry only to his equal or lower intellectual order women. All other forms are disallowed.

In below passage, it has been said by Bhishma that, Brahmana can marry all the other divisions, Kshatriya can marry all but Brahamana. Vaishya can marry Vaishya & Shudra. Shudra can marry only Shudra. In general, for the Dvija divisions, marrying a Shudra is not preferred and may result in expiation [particularly to Brahamana]

A Brahmana can take three wives. A Kshatriya can take two wives. As regards the Vaisya, he should take a wife from only his own order. The children born of these wives should all be regarded as equal. 2 Of the three wives of a Brahmana, she taken from his own order should be regarded as the foremost. Similarly, of the two wives permitted to the Kshatriya, she taken from his own order should be regarded as superior. Some say that persons belonging to the three higher orders may take, only for purposes of enjoyment (and not for those of virtue), wives from the lowest or the Sudra order. Others, however, forbid the practice. The righteous condemn the practice of begetting issue upon Sudra women. A Brahmana, by begetting children upon a Sudra woman, incurs the liability of performing an expiation. [AnushAsana parva]

Above passage states the eligibility of a man belonging to particular division to marry a woman of certain division. But IMO, it implicitly also suggests that, multiple wives are allowed.

Opposite form, i.e. the "polyandry" is forbidden.