100.1 Al-Wahidi recorded
(By the snorting courses…) [100:1-11]. Muqatil said: “The Messenger of Allah (صلى الله عليه وآله وسلم) sent a military expedition to a clan of Banu Kinanah and appointed al-Mundhir ibn ‘Amr al-Ansari as its leader. When their news was late to come, the hypocrites said: ‘They have all been killed’, and so Allah, exalted is He, gave news about this expedition and revealed (By the snorting courses) meaning the horses of that expedition”. ‘Abd al-Ghafir ibn Muhammad al-Farisi informed us> Ahmad ibn Muhammad al-Basti> Muhammad ibn Makki> Ishaq ibn Ibrahim> Ahmad ibn ‘Abdah> Hafs ibn Jami‘> Simak> ‘Ikrimah> Ibn ‘Abbas who related that the Messenger of Allah, Allah bless him and give him peace, sent a cavalry in a mission but did not receive any news from them a month after they had left. And so it was revealed (By the snorting courses) i.e. the horses snorting with their nostrils.
100.2 Imam Muhammad bin Nasr narrated
From Hadrat A’ta bin Abi Rabah that Ibn Abbas (رضي الله عنهم) reported that the Messenger of Allah (صلى الله عليه وآله وسلم) said Itha Zulzilati (Surah 99) is equal to half of the Quran. Wal Aadiyati (Surah 100) is also equivalent to half of the Quran . Qul Huwa Allahu Ahad (Surah 112) is equal to one-third of the Quran and Qul Ya Ayyuha Al-Kafiroon (Surah 109) is one-fourth of the Quran.
100.3 Abu ‘Ubayd narrated
A mursal report from al-Hasan al-Basri: “ ‘When the earth is shaken with its (final) earthquake’ is equivalent to half of the Qur’an, and ‘By the (steeds) that run’ (Soorat al-‘Aadiyaat) is equivalent to half of the Qur’an.”
(al-Itqaan by al-Suyooti 2/413)
100.4 The Prophet (صلى الله عليه وآله وسلم) said
‘Whoever recites Aadiyat his reward equals one half of the Qur’an’
(Hakim 1/566, Tirmidhi 2894)