Grading: Because of Shaddad bin Ma'qil, its chain is "hasan", and he has been corroborated.
Identification of narrators: Al-Humaydi is 'Abd Allah bin al-Zubayr bin 'Isa al-Asadi, and Sufyan is Ibn 'Uyaynah.

Reference / Source: Al-Bukhari narrated it in "Khalq Af'al al-'Ibad" (368) from al-Humaydi with this same chain.

Reference / Source: It was narrated by Sa'id bin Mansur in the Tafsir section of his "Sunan" (97); Nu'aym bin Hammad in "al-Fitan" (1669, 1685); Ibn Battah in "al-Ibanah al-Kubra" (5/365); al-Dani in "al-Sunan al-Waridah fi al-Fitan" (269, 272); and al-Bayhaqi in "Shu'ab al-Iman" (1869), by the route of Sufyan bin 'Uyaynah.

Reference / Source: It was narrated by 'Abd al-Razzaq (5980, 5981), Ibn Abi Shaybah (10/534, 15/175), al-Bukhari in "Khalq al-Af'al" (367), Ibn Abi al-Dunya in "Makarim al-Akhlaq" (274), al-Tabari in his "Tafsir" (15/158), al-Khara'iti in "Makarim al-Akhlaq" (176), al-Tabarani in "al-Kabir" (8699, 8700), Ibn Battah (5/365-366), al-Bayhaqi in "al-Sunan" (6/289) and "al-Shu'ab" (4891), and al-Wahidi in "al-Wasit" (3/126), by various routes from 'Abd al-'Aziz bin Rufay' - in some of them it is abridged. Also, 'Abd al-Razzaq (5980), al-Tabarani (8698) and Ibn Battah (5/366) narrated it by the route of al-Musayyab bin Rafi', from Shaddad bin Ma'qil.

Details of the narration: Its first part (the first thing that will be lost) was narrated by Ibn Abi Shaybah (14/102), Ibn Abi al-Dunya (267), al-Khallal in "al-Sunnah" (1391) and al-Tabarani (9754) by the route of Abu al-Za'ra' 'Abd Allah bin Hani', from Ibn Mas'ud.

Grading: Because of Abu al-Za'ra', this chain may possibly reach the level of "hasan", Allah willing, in the context of "corroborating chains and supporting reports".

Corroborating chains and supporting reports: Its second part was narrated similarly by al-Darimi in his "Musnad" (3386) by the route of Zirr bin Hubaysh, from Ibn Mas'ud, and its chain is "hasan".
Technical note: Something like its first part is also narrated from the Prophet (peace and blessings be upon him) as "marfu'". Al-Bukhari narrated it in "al-Tarikh al-Kabir" (2/158), al-Khara'iti in "Makarim al-Akhlaq" (173), Tammam al-Razi in his "Fawa'id" (191) and Abu Nu'aym in "al-Hilyah" (1/155), by the route of Musa bin Isma'il al-Tabudhaki, from Tawwab (or Thawwab) bin Hujayl, from Thabit al-Bunani, from Anas, from the Prophet (peace and blessings be upon him), that: "The first thing you will lose of your religion is the trust (amanah), and the last of it is the prayer."
Grading: Tawwab bin Hujayl is counted among the majhul narrators; no one other than al-Tabudhaki narrated from him, and Ibn Hibban mentioned him in "al-Thiqat".

Corroborating chains and supporting reports: This hadith is also narrated from 'Umar as "marfu'" (Abu Nu'aym: 2/174), by the route of Hakim bin Nafi', from Yahya bin Sa'id al-Ansari, from Sa'id bin al-Musayyab, from 'Umar.
Technical note: Hakim bin Nafi' is a narrator about whom there is disagreement (mukhtalaf fihi), and he is not very strong.

Note / Clarification: See also the previous report of Hudhayfah (may Allah be pleased with him), no. (8654).

Grading: Its chain is sahih.
Identification of narrators: Sufyan is Ibn 'Uyaynah, and al-Mas'udi is 'Abd al-Rahman bin 'Abd Allah bin 'Utbah; he had suffered "ikhtilat" (memory deterioration), but here he has been "corroborated", as will come later. Al-Qasim bin 'Abd al-Rahman is Ibn 'Abd Allah bin Mas'ud.

Reference / Source: It was narrated by Ibn Abi Shaybah (12/190) and Ibn 'Asakir (1/313-314) by the route of Yazid bin Harun; al-Tabarani (8857) by the route of Abu Nu'aym al-Fadl bin Dukayn; and Ibn 'Asakir (1/313) by the route of Abu Dawud al-Tayalisi. All three narrate it from al-Mas'udi, from al-Qasim bin 'Abd al-Rahman, from his grandfather 'Abd Allah bin Mas'ud, as "mursal".

Details of the narration: Ma'mar also narrated it in his "Jami'" (20779), and by his route al-Tabarani (8856), from al-A'mash, from al-Qasim bin 'Abd al-Rahman, as "mursal".

Technical note: He was contradicted by Abu Mu'awiyah (in Nu'aym bin Hammad's "al-Fitan": 1830 and Ibn 'Asakir: 1/314) and Sufyan al-Thawri (in Ya'qub's "al-Ma'rifah wa al-Tarikh": 2/305 and Ibn 'Asakir: 1/314). Both of them narrated it from al-A'mash, from al-Qasim bin 'Abd al-Rahman, from his father, from Ibn Mas'ud, making it "mawsul" (connected).

Note / Clarification: "Yuzwa" means: it will be gathered up and withdrawn.

Note / Clarification: "'Unsur" of anything is its origin. The meaning is that the water will sink into the depths of the earth, and no one will be able to reach it.