Allaah (The Most High) said:

فَمَنْ كَانَ يَرْجُو لِقَاءَ رَبِّهِ فَلْيَعْمَلْ عَمَلًا صَالِحًا وَلَا يُشْرِكْ بِعِبَادَةِ رَبِّهِ أَحَدًا

So whoever hopes for the Meeting with his Lord, let him work righteousness and associate none as a partner in the worship of his Lord.” [Surah Al-Kahf. Ayah 110]

Allaah (The Most High) stated:

إِنَّ ٱلَّذِينَ يَتۡلُونَ كِتَـٰبَ ٱللَّهِ وَأَقَامُواْ ٱلصَّلَوٰةَ وَأَنفَقُواْ مِمَّا رَزَقۡنَـٰهُمۡ سِرًّ۬ا وَعَلَانِيَةً۬ يَرۡجُونَ تِجَـٰرَةً۬ لَّن تَبُورَ

لِيُوَفِّيَهُمۡ أُجُورَهُمۡ وَيَزِيدَهُم مِّن فَضۡلِهِۚۦۤ إِنَّهُ ۥ غَفُورٌ۬ شَڪُورٌ

Verily, those who recite the Book of Allah (this Qur’an), and perform As-Salat (Iqamat-as-Salat), and spend (in charity) out of what We have provided for them, secretly and openly, hope for a (sure) trade-gain that will never perish.  That He may pay them their wages in full, and give them (even) more, out of His Grace. Verily! He is Oft-Forgiving, Most Ready to appreciate (good deeds and to recompense). [Surah Faatir Aayaat 29-30]

Allaah (The Most High) said:

مَنْ عَمِلَ صَالِحًا مِنْ ذَكَرٍ أَوْ أُنْثَى وَهُوَ مُؤْمِنٌ فَلَنُحْيِيَنَّهُ حَيَاةً طَيِّبَةً وَلَنَجْزِيَنَّهُمْ أَجْرَهُمْ بِأَحْسَنِ مَا كَانُوا يَعْمَلُونَ

Whoever works righteousness, whether male or female, while he (or she) is a true believer (of Islamic Monotheism) verily, to him We will give a good life (in this world with respect, contentment and lawful provision), and We shall pay them certainly a reward in proportion to the best of what they used to do (i.e. Paradise in the Hereafter). [Surah An-Nahl. Ayah 97]

Allaah (The Most High) said:

مَنْ كَفَرَ فَعَلَيْهِ كُفْرُهُ وَمَنْ عَمِلَ صَالِحًا فَلِأَنْفُسِهِمْ يَمْهَدُونَ

Whosoever disbelieves will suffer from his disbelief, and whosoever does righteous good deeds (by practising Islamic Monotheism), then such will prepare a good place (in Paradise) for themselves (and will be saved by Allah from His Torment). [Surah Ar-Rum. Ayah 44]

Allaah (The Most High) said:

 إِنَّ الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ أُولَئِكَ هُمْ خَيْرُ الْبَرِيَّةِ

جَزَاؤُهُمْ عِنْدَ رَبِّهِمْ جَنَّاتُ عَدْنٍ تَجْرِي مِنْ تَحْتِهَا الْأَنْهَارُ خَالِدِينَ فِيهَا أَبَدًا رَضِيَ اللَّهُ عَنْهُمْ وَرَضُوا عَنْهُ ذَلِكَ لِمَنْ خَشِيَ رَبَّهُ

Verily, those who believe [in the Oneness of Allah, and in His Messenger (Muhammad) including all obligations ordered by Islam] and do righteous good deeds, they are the best of creatures. Their reward with their Lord is ‘Adn (Eden) Paradise (Gardens of Eternity), underneath which rivers flow, they will abide therein forever, Allah Well-Pleased with them, and they with Him. That is for him who fears his Lord. [Surah Al-Bayyinah. Aayat 7-8]

The Prophet (sallal-laahu-alayhi-wasallam) said:

إِنَّ اللهَ لَا يَنْظُرُ إِلَى صُوَرِكُمْ وَأَمْوَالِكُمْ، وَلَكِنْ يَنْظُرُ إِلَى قُلُوبِكُمْ وَأَعْمَالِكُمْ

”Indeed, Allaah does not look at images and your wealth, but He looks at your hearts and your actions.”

[Hadeeth reported by Abu Hurairah. Saheeh Muslim]

The Prophet (sallal-laahu-alayhi-wasallam) said:

يَتْبَعُ المَيِّتَ ثَلاَثَةٌ ، فَيَرْجِعُ اثْنَانِ وَيَبْقَى وَاحِدٌ

يَتْبَعُهُ أَهْلُهُ وَمَالُهُ وَعَمَلُهُ، فَيَرْجِعُ أَهْلُهُ وَمَالُهُ ، وَيَبْقَى عَمَلُهُ

The dead person is followed by three, two of which return (after his  burial) and one remains (with him): his relatives, his property and his deeds follow him. The relatives and his property return (to the worldly life) and his deeds remain (with him)

[Hadeeth reported by Anas. Bukhaari and Muslim]