As-Salaam alaikum,
About chapter 109 of the Holy Qur'an, Surat Qul-Ya Ayuhal Kafiruun, which consists of six (6) ayats or verses, it has been narrated by an-Nisaa'i, Tirmidhi, al-Haakim and at-Tabarani and others on the authority of Anas Ibn Malik, may Allah be pleased with him, who said the Messenger of Allah, Sallallahu alaihi Wasallam, said:--
"Qul Ya Ayuhal Kafiruun [reading chapter 109 of the Qur'an] equals a fourth of the Qur'an."
In another narration of Sa'aad:--
"Qul Ya Ayuhal Kafiruun, it is as if he recited a fourth of the Qur'an."
And it has been related by Ahmed, Abu Dawud on the authority of Nufayl Ibn Mu'awiyya who said that the Prophet, Sallallahu alaihi Wasallam, said:--
"Whenever one of you retires to his bed at night he should recite: 'Qul Ya Ayuhal Kafiruun' and then goes to
sleep after reading it will be free of polytheism [shirk]."
And it has been related by ad-Daylami on the authority of Abdullah Ibn Jaraad who said that the Messenger of Allah, Sallallahu alaihi Wasallam, said:--
"The hypocrite cannot pray the forenoon prayer (duhaa) nor can he recite Qul Ya Ayuhal Kafiruun."