The Prophet ﷺ said, "Shall I not tell you of the best of your deeds, the purest of them in the sight of your Sovereign, the highest of them in raising your ranks, better for you than spending gold and silver, and better for you than meeting your enemy so that you strike their necks and they strike yours?"They replied, "Yes, please do."He said, "The remembrance of Allah the Exalted."Muaz bin Jabal then said, "Nothing saves a person from the punishment of Allah more than the remembrance of Allah."
قال النبي ﷺ: ألا أنبئكم بخير أعمالكم، وأزكاها عند مليككم، وأرفعها في درجاتكم، وخير لكم من إنفاق الذهب والورق، وخير لكم من أن تلقوا عدوكم فتضربوا أعناقهم ويضربوا أعناقكم. قالوا: بلي. قال: ذكر الله تعالى. فقال معاذ بن جبل: ما شيء أنجى من عذاب الله من ذكر الله.
Tirmidhi (3377), Ibn Majah (3790), and Ahmad (21702) narrated it, and Hakim graded it sahih (1/496), all of them through various routes from Abdullah bin Saeed bin Abu Hind, from Ziyad bin Abu Ziyad, the freed slave of Ibn Ayyash, from Abu Bahriya (who is Abdullah bin Qays), from Abu Darda, who then related it. Its chain of transmission is hasan because of Abdullah bin Saeed bin Abu Hind, for there is disagreement about him, though he narrates hasan hadith. There has been disagreement about its chain, and what I have mentioned is the soundest version of it.As for what has been narrated from Abu Saeed Khudri, that the Messenger of Allah ﷺ was asked, "Which of the servants of Allah has the highest rank with Allah on the Day of Resurrection?" He said, "Those men and women who remember Allah much." I said, "O Messenger of Allah, what about one who fights in the cause of Allah?" He said, "Even if he strikes with his sword against the disbelievers and polytheists until it breaks and becomes stained with blood, those who remember Allah much would still have a higher rank than him." Its chain of transmission is daif.Tirmidhi (3376) narrated it from Qutayba, who said, "Ibn Lahia related to us, from Darraj, from Abu Haytham, from Abu Saeed Khudri," who then related it. Ahmad (11720) and Ibn Adi, in the biography of Darraj Misri in Kamil (3/981), also narrated it through two other routes from Ibn Lahia with the same wording. Tirmidhi said, "This is a rare hadith, we only know it through the hadith of Darraj." I say, Darraj's narration from Abu Haytham is daif, and this hadith of his is among those that were criticized as unreliable, as Ibn Adi mentioned in Kamil.Likewise, what has been narrated from Umar bin Khattab is not sound, that the Prophet ﷺ sent out a military expedition toward Najd, and they gained abundant spoils and returned quickly. A man who had not gone out with them said, "We have never seen an expedition return more quickly or with better spoils than this one." The Prophet ﷺ said, "Shall I not tell you of people with better spoils and a quicker return? People who attended the dawn prayer, then sat remembering Allah until the sun rose upon them. They are the ones with the quickest return and the best spoils."Tirmidhi (3561) and Ibn Adi in Kamil fi Duafa (2/658) both narrated it through the route of Abdullah bin Nafi Saigh, from Hammad bin Abu Humayd, from Zayd bin Aslam, from his father, from Umar bin Khattab, who then related it. Tirmidhi said, "This is a rare hadith, we know it only through this route. Hammad bin Abu Humayd is Muhammad bin Abu Humayd Madani, who is Abu Ibrahim Ansari Madini, and he is daif in hadith."Likewise, what has been narrated from Umara bin Zakara is not sound, that he said, "I heard the Messenger of Allah ﷺ say, 'Allah says, My servant, truly my servant, is the one who remembers me while meeting his enemy,'" meaning at the time of battle. Tirmidhi (3580), Ibn Abu Asim in Jihad (130), and Ibn Adi in Kamil (5/2018) all narrated it through the route of Walid bin Muslim, who said, "Ufayr bin Madan related to us that he heard Abu Daws Yahsubi narrating from Ibn Aidh Yahsubi, from Umara bin Zakara," who then related it. Ufayr bin Madan is daif. That is why Tirmidhi said, "This is a rare hadith, we know it only through this route, and its chain of transmission is not strong, and we do not know of any hadith from Umara bin Zakara from the Prophet ﷺ other than this single hadith."Nor is it sound, what has been narrated from Abu Saeed Khudri, that he said, "A man came to the Prophet ﷺ and said, 'Advise me.' He said, 'Hold fast to fearing Allah, for it is the sum of all good. Hold fast to jihad, for it is the monasticism of the Muslims. Hold fast to remembering Allah and reciting His Book, for it is a light for you on earth and a mention of you in heaven. Guard your tongue except for good, for by that you overcome Satan.'"Abu Yaala (1000), Tabarani in Saghir (949), and Bayhaqi in Adab (1014) all narrated it through the route of Layth bin Abu Salim, from Mujahid, from Abu Saeed Khudri, who then related it. Ahmad bin Hanbal said of Layth bin Abu Salim that his hadith is confused, and Abu Zura, Abu Hatim, and others declared him daif.Nor is it strengthened by what Imam Ahmad (11774) narrated through the route of Ismail bin Ayyash, from Hajjaj bin Marwan Kalai and Aqeel bin Mudrik Sulami, from Abu Saeed Khudri, with similar wording. This is because Hajjaj bin Marwan Kalai is unknown, which is why Ibn Hajar said nothing about him, and merely quoted the statement of Husayni that he is not well known. As for Aqeel bin Mudrik Sulami, he did not meet Abu Saeed Khudri, so the chain of transmission is broken, and it is not known who the missing link is, whether he is a discarded narrator or not.