Allah, the Exalted, said:
٦ - باب في التقوى
Allah, the Exalted, said:
O you who have believed, fear Allāh as He should be feared and do not die except as Muslims [in submission to Him].
And He, the Exalted, said:
So fear Allāh as much as you are able and listen and obey and spend [in the way of Allāh]; it is better for your selves. And whoever is protected from the stinginess of his soul - it is those who will be the successful.
This verse makes plain what is intended by the first one. And He, the Exalted, said:
O you who have believed, fear Allāh and speak words of appropriate justice.
The verses commanding God-consciousness (taqwā) are many and well-known. And He, the Exalted, said:
And when they have [nearly] fulfilled their term, either retain them according to acceptable terms or part with them according to acceptable terms. And bring to witness two just men from among you and establish the testimony for [the acceptance of] Allāh. That is instructed to whoever should believe in Allāh and the Last Day. And whoever fears Allāh - He will make for him a way out1
And He, the Exalted, said:
O you who have believed, if you fear Allāh, He will grant you a criterion1 and will remove from you your misdeeds and forgive you. And Allāh is the possessor of great bounty.
The verses on this subject are many and well-known.
As for the hadiths:
The first: On the authority of Abū Hurayra (may Allah be pleased with him), who said: It was said: "O Messenger of Allah, who is the most noble of people?" He said: "The most God-conscious of them." So they said: "It is not about this that we ask you." He said: "Then it is Yūsuf, the prophet of Allah, son of the prophet of Allah, son of the prophet of Allah, son of the intimate friend of Allah [Ibrāhīm]." They said: "It is not about this that we ask you." He said: "Then is it about the lineages of the Arabs that you ask me? The best of them in the pre-Islamic era are the best of them in Islam, when they gain understanding [of the religion]." Agreed upon (by al-Bukhārī and Muslim). And "faquhū" is pronounced with a ḍamma on the qāf according to the well-known reading, though a kasra has also been related: that is, they came to know the rulings of the Sacred Law.
The second: On the authority of Abū Saʿīd al-Khudrī (may Allah be pleased with him), from the Prophet ﷺ, who said: "Indeed the world is sweet and green, and Allah is appointing you as successors in it to see how you will act. So beware of the world, and beware of women; for the first trial of the Children of Israel was in connection with women." Narrated by Muslim.
The third: On the authority of Ibn Masʿūd (may Allah be pleased with him): that the Prophet ﷺ used to say: "O Allah, I ask You for guidance, God-consciousness, chastity, and self-sufficiency." Narrated by Muslim.
The fourth: On the authority of Abū Ṭarīf ʿAdī b. Ḥātim al-Ṭāʾī (may Allah be pleased with him), who said: I heard the Messenger of Allah ﷺ say: "Whoever swears an oath and then sees something more God-fearing towards Allah than it, let him take up the more God-fearing course." Narrated by Muslim.
The fifth: On the authority of Abū Umāma Ṣudayy b. ʿAjlān al-Bāhilī (may Allah be pleased with him), who said: I heard the Messenger of Allah ﷺ delivering a sermon during the Farewell Pilgrimage, and he said: "Fear Allah, perform your five [daily prayers], fast your month, pay the zakāt on your wealth, and obey your leaders—[then] you will enter the Paradise of your Lord." Narrated by al-Tirmidhī, at the end of the Book of Prayer, and he said: "A good and sound hadith (ḥasan ṣaḥīḥ)."