It was the custom among the companions of Muhammad (ﷺ) that if any of them was observing Saum (fast) and the food was presented [for-breaking his Șaum (fast)], but he slept before eating, he would not eat that night and the following day till sunset. Qais bin Şirma-Al-was observing Ṣaum (fast) and came to his wife at the time of [breaking one's Saum (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 (ﷺ) was informed about the whole matter and the following Verses were revealed:-" It is made lawful for you to have sexual relations with your wives on the night of the fasts. They are Libâs [i.e. body-cover or screen or Sakan (i.e. you enjoy the pleasure of living with her as in Verse 7:189). Tafsir-at-Ṭabari] 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)." So they were rejoiced greatly by it. And then Allah also revealed, "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 ". (V.2:187). [3:139-0.B]