Al-Baqara 2:187

It has been made permissible for you to be intimate with your wives on the nights of the fast. They are a garment for you just as you are a garment for them. Allah knows that you used to deceive yourselves, so He accepted your repentance and pardoned you. So now you may have intimacy with them[84] and seek what Allah has destined for you. And eat and drink until you see the light of dawn distinct from the darkness of night, then complete the fast until nightfall. However, should you be in a devotional retreat in the mosques then do not be intimate with them. These are the limits set by Allah, so do not even come near to them. This is how Allah makes His verses clear to people, so that they may become righteous.

[84] Prior to this revelation, marital relations were unlawful during nights preceding fasting. Some were unable to refrain and secretly disobeyed, but Allah accepted their repentance, and then it was made lawful.

It has been made permissible for you the night preceding fasting to go to your wives [for sexual relations]. They are a clothing for you and you are a clothing[67] for them. Allāh knows that you used to deceive yourselves,[68] so He accepted your repentance and forgave you. So now, have relations with them and seek that which Allāh has decreed for you [i.e., offspring]. And eat and drink until the white thread of dawn becomes distinct to you from the black thread [of night]. Then complete the fast until the night [i.e., sunset]. And do not have relations with them as long as you are staying for worship in the mosques. These are the limits [set by] Allāh, so do not approach them. Thus does Allāh make clear His verses [i.e., ordinances] to the people that they may become righteous.

[67] Also a source of tranquility and rest.
[68] Prior to this revelation, marital relations were unlawful during nights preceding fasting. Some were unable to refrain and secretly disobeyed, but they did not deceive Allāh.

187. It is made lawful for you to have sexual relations with your wives on the night of As-Saum (the fasts). They are Libâs [i.e. body cover, or screen, or Sakan, (i.e. you enjoy the pleasure of living with them - as in Verse 7:189) Tafsir At-Tabarî ], for you and you are the same for them. Allâh knows that you used to deceive yourselves, so He turned to you (accepted your repentance) and forgave you. So now have sexual relations with them and seek that which Allâh has ordained for you (offspring), and eat and drink until the white thread (light) of dawn appears to you distinct from the black thread (darkness of night), then complete your Saum (fast) till the nightfall. And do not have sexual relations with them (your wives) while you are in I‘tikâf (i.e. confining oneself in a mosque for prayers and invocations leaving the worldly activities) in the mosques. These are the limits (set) by Allâh, so approach them not. Thus does Allâh make clear His Ayât (proofs, evidence, lessons, signs, revelations, verses, laws, legal and illegal things, Allâh’s set limits, orders) to mankind that they may become Al-Muttaqûn (the pious - See V.2:2).

It is made lawful for you to go in unto your wives on the night of the fast. They are raiment for you and ye are raiment for them. Allah is Aware that ye were deceiving yourselves in this respect and He hath turned in mercy toward you and relieved you. So hold intercourse with them and seek that which Allah hath ordained for you, and eat and drink until the white thread becometh distinct to you from the black thread of the dawn. Then strictly observe the fast till nightfall and touch them not, but be at your devotions in the mosques. These are the limits imposed by Allah, so approach them not. Thus Allah expoundeth His revelation to mankind that they may ward off (evil).