"Remain upright as you have been commanded, you and those repentant along with you, and do not transgress." [11:112]
Integrity, Uprightness, and Steadfastness | Al-Nawawi | Riyad al-Salihin
In the name of Allah, the Gracious, the Merciful
Al-Nawawi recorded in his book Riyad al-Salihin:
باب في الاستقامة
Chapter on integrity, uprightness, and steadfastness.
Source: Riyāḍ al-Ṣāliḥīn 1/38
Allah Almighty said:
فَاسْتَقِمْ كَمَا أُمِرْتَ وَمَن تَابَ مَعَكَ وَلَا تَطْغَوْا إِنَّهُ بِمَا تَعْمَلُونَ بَصِيرٌ
Remain upright as you have been commanded, you and those who turn in repentance along with you, and do not transgress. Verily, He sees what you do.
Surat Hud 11:112
And Allah said:
إِنَّ الَّذِينَ قَالُوا رَبُّنَا اللَّهُ ثُمَّ اسْتَقَامُوا تَتَنَزَّلُ عَلَيْهِمُ الْمَلَائِكَةُ أَلَّا تَخَافُوا وَلَا تَحْزَنُوا وَأَبْشِرُوا بِالْجَنَّةِ الَّتِي كُنتُمْ تُوعَدُونَ نَحْنُ أَوْلِيَاؤُكُمْ فِي الْحَيَاةِ الدُّنْيَا وَفِي الْآخِرَةِ وَلَكُمْ فِيهَا مَا تَشْتَهِي أَنفُسُكُمْ وَلَكُمْ فِيهَا مَا تَدَّعُونَ نُزُلًا مِّنْ غَفُورٍ رَّحِيمٍ
Verily, those who say our Lord is Allah and then remain upright, the angels will descend upon them, saying: Do not fear nor grieve, and receive glad tidings of Paradise that you have been promised. We were your allies in the world and in the Hereafter. You will have therein whatever your souls desire and request, an accommodation from the Forgiving, the Merciful.
Surat Fussilat 41:30-32
And Allah said:
إِنَّ الَّذِينَ قَالُوا رَبُّنَا اللَّهُ ثُمَّ اسْتَقَامُوا فَلَا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ أُولَٰئِكَ أَصْحَابُ الْجَنَّةِ خَالِدِينَ فِيهَا جَزَاءً بِمَا كَانُوا يَعْمَلُونَ
Verily, those who say our Lord is Allah and then remain upright, they will not fear, nor will they grieve. Those are the companions of Paradise, abiding therein as a reward for what they have done.
Surat al-Ahqaf 46:13-14
Sufyan ibn Abdullah reported: I said, “O Messenger of Allah, tell me of a word in Islam I will not need to ask of anyone after you.” The Messenger of Allah, peace and blessings be upon him, said:
قُلْ آمَنْتُ بِاللَّهِ فَاسْتَقِمْ
Say, ‘I have faith in Allah,’ and then remain steadfast.
Source: Ṣaḥīḥ Muslim 38, Grade: Sahih
Aisha reported: The Messenger of Allah, peace and blessings be upon him, said:
سَدِّدُوا وَقَارِبُوا وَأَبْشِرُوا فَإِنَّهُ لَنْ يُدْخِلَ الْجَنَّةَ أَحَدًا عَمَلُهُ
Follow the right course, seek nearness to Allah, and give glad tidings. Verily, none of you will enter Paradise by his deeds alone.
They said, “Not even you, O Messenger of Allah?” The Prophet said:
وَلَا أَنَا إِلَّا أَنْ يَتَغَمَّدَنِيَ اللَّهُ مِنْهُ بِرَحْمَةٍ وَاعْلَمُوا أَنَّ أَحَبَّ الْعَمَلِ إِلَى اللَّهِ أَدْوَمُهُ وَإِنْ قَلَّ
Not even me, unless Allah grants me his mercy. Know that the most beloved deed to Allah is that which is done regularly, even if it is small.
Source: Ṣaḥīḥ al-Bukhārī 6099, Grade: Muttafaqun Alayhi
Success comes from Allah, and Allah knows best.