Tafsir of Al-Ma'idah 5:31

Then Allah sent a crow who scratched the ground to show him how to hide the dead body of his brother. He (the murderer) said, "Woe to me! Am I not even able to be as this crow and to hide the dead body of my brother!'' Then he became one of those who regretted. As-Suddi said that the Companions said, "When his brother died, Qabil left him on the bare ground and did not know how to bury him. Allah sent two crows, which fought with each other until one of them killed the other. So it dug a hole and threw sand over the dead corpse (which it placed in the hole). When Qabil saw that, he said,

يا ويلتا أعجزت أن أكون مثل هذا الغراب فٲواري سوءة أخي

("Woe to me! Am I not even able to be as this crow and to hide the dead body of my brother!''). Ali bin Abi Talhah reported that Ibn Abbas said, "A crow came to the dead corpse of another crow and threw sand over it, until it hid it in the ground. He who killed his brother said,

يا ويلتا أعجزت أن أكون مثل هذا الغراب فٲواري سوءة أخي

(Woe to me! Am I not even able to be as this crow and to hide the dead body of my brother!).'' Al-Hasan Al-Basri commented on the statement,

فٲصبح من النادمين

(Then he became one of those who regretted). "Allah made him feel sorrow after the loss that he earned.'' The Swift Punishment for Transgression and Cutting the Relations of the Womb A Hadith states that the Prophet said,

ما من ذنب أجدر أن يعجل الله عقوبته في الدنيا مع ما يدخر لصاحبه في اﻻخرة من البغي وقطيعة الرحم

There is no sin that is more worthy of Allah hastening its punishment in this life, in addition to what He has in store for its offender in the Hereafter, more than transgression and cutting the relations of the womb. The act of Qabil included both of these. We are Allah's and to Him is our return