The Holy Qur’an
And when My servants ask you, [O Muhammad], concerning Me – indeed I am near. I respond to the invocation of the supplicant when he calls upon Me. So let them respond to Me [by obedience] and believe in Me that they may be [rightly] guided.
It has been made permissible for you the night preceding fasting to go to your wives [for sexual relations]. They are clothing for you and you are clothing for them., so He accepted your repentance and forgave you. So now, have relations with them and seek that which Allah has decreed for you. 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 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] Allah, so do not approach them. Thus does Allah make clear His ordinances to the people that they may become righteous.
And do not consume one another’s wealth unjustly or send it [in bribery] to the rulers in order that [they might aid] you [to] consume a portion of the wealth of the people in sin, while you know [it is unlawful]. – The Holy Qur’an 2:186-188.
Narrated by Al-Bara: It was the custom among the companions of Muhammad that if any of them was fasting and the food was presented (for breaking his fast), but he slept before eating; he would not eat that night and the following day till sunset. Qais bin Sirma-al-Ansari was fasting and came to his wife at the time of Iftar (breaking one’s fast) and asked her whether she had anything to eat. She replied, “No, but I would go and bring some for you.” He used to do hard work during the day, so he was overwhelmed by sleep and slept. When his wife came and saw him, she said, “Disappointment for you.” When it was midday on the following day, he fainted and the Prophet (SWS) was informed about the whole matter and the following verses were revealed: “You are permitted to go to your wives (for sexual relation) at the night of fasting.” So, they were overjoyed by it. And then Allah also revealed: “And eat and drink until the white thread of dawn appears to you Distinct from the black thread (of the night).”-Shahi Bukhari Vol.3No. 139.
The Holy Qur’an