Al-Mundhiri records in his book al-Targhib wal-Tarhib:

التَّرْغِيب فِي الْفَرَاغ لِلْعِبَادَةِ والإقبال على الله تَعَالَى والترهيب من الاهتمام بالدنيا والانهماك عَلَيْهَا

Encouragement to use free time for worship and turning to Allah Almighty, and discouragement from being concerned with the world and being consumed by it.

Source: al-Targhīb wal-Tarhīb 4/55

Ma’qil ibn Yasar reported: The Messenger of Allah, peace and blessings be upon him, said:

قَالَ رَبُّكُمْ تَعَالَى ابْنَ آدَمَ تَفَرَّغْ لِعِبَادَتِي أَمْلَأْ قَلْبَكَ غِنًى وَامْلَأْ يَدَيْكَ رِزْقًا ابْنَ آدَمَ لَا تَبَاعَدْ عَنِّي فَأَمْلَأْ قَلْبَكَ فَقْرًا وَأَمْلَأْ يَدَيْكَ شُغْلًا

Your Lord Almighty said: Son of Adam, be free for My worship. I will fill your heart with richness and fill your hands with provision. Son of Adam, do not distance yourself from Me, or else I will fill your heart with poverty and fill your hands with worthless distractions.

Source: al-Mu’jam al-Kabīr 500, Grade: Sahih

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said:

إِنَّ اللَّهَ تَعَالَى يَقُولُ يَا ابْنَ آدَمَ تَفَرَّغْ لِعِبَادَتِي أَمْلَأْ صَدْرَكَ غِنًى وَأَسُدَّ فَقْرَكَ وَإِلَّا تَفْعَلْ مَلَأْتُ يَدَيْكَ شُغْلًا وَلَمْ أَسُدَّ فَقْرَكَ

Allah Almighty said: O son of Adam, be free for My worship and I will fill your heart with riches and alleviate your poverty. If you do not do so, I will fill your hands with problems and never alleviate your poverty.

Source: Sunan al-Tirmidhī 2466, Grade: Sahih

Abu Darda reported: The Messenger of Allah, peace and blessings be upon him, said:

مَا طَلَعَتْ شَمْسٌ قَطُّ إِلَّا بُعِثَ بِجَنْبَتَيْهَا مَلَكَانِ يُنَادِيَانِ يُسْمِعَانِ أَهْلَ الْأَرْضِ إِلَّا الثَّقَلَيْنِ يَا أَيُّهَا النَّاسُ هَلُمُّوا إِلَى رَبِّكُمْ فَإِنَّ مَا قَلَّ وَكَفَى خَيْرٌ مِمَّا كَثُرَ وَأَلْهَى وَلَا آبَتْ شَمْسٌ قَطُّ إِلَّا بُعِثَ بِجَنْبَتَيْهَا مَلَكَانِ يُنَادِيَانِ يُسْمِعَانِ أَهْلَ الْأَرْضِ إِلَّا الثَّقَلَيْنِ اللَّهُمَّ أَعْطِ مُنْفِقًا خَلَفًا وَأَعْطِ مُمْسِكًا مَالًا تَلَفًا

The sun never rises but that two angels are sent at its sides, calling out. They are heard by all the inhabitants of the earth except humans and jinn: O people, come quickly to your Lord! What is little and sufficient is better than what is abundant and negligent! The sun never sets but that two angels are sent at its sides, calling out. They are heard by all the inhabitants of the earth except humans and jinn: O Allah, repay one who spends in charity! O Allah, give destruction to one who withholds charity!

Source: Musnad Aḥmad 21176, Grade: Sahih

Zayd ibn Thabit reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ كَانَتْ الدُّنْيَا هَمَّهُ فَرَّقَ اللَّهُ عَلَيْهِ أَمْرَهُ وَجَعَلَ فَقْرَهُ بَيْنَ عَيْنَيْهِ وَلَمْ يَأْتِهِ مِنْ الدُّنْيَا إِلَّا مَا كُتِبَ لَهُ وَمَنْ كَانَتْ الْآخِرَةُ نِيَّتَهُ جَمَعَ اللَّهُ لَهُ أَمْرَهُ وَجَعَلَ غِنَاهُ فِي قَلْبِهِ وَأَتَتْهُ الدُّنْيَا وَهِيَ رَاغِمَةٌ

Whoever is concerned about the world, Allah will disorder his affairs, make poverty appear before his eyes, he will not get anything from the world but what has been decreed for him. Whoever is concerned about the Hereafter, Allah will settle his affairs, make him content in his heart, the world will come to him although he reluctant is for it.

Source: Sunan Ibn Mājah 4105, Grade: Sahih

Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ كَانَتْ الْآخِرَةُ هَمَّهُ جَعَلَ اللَّهُ غِنَاهُ فِي قَلْبِهِ وَجَمَعَ لَهُ شَمْلَهُ وَأَتَتْهُ الدُّنْيَا وَهِيَ رَاغِمَةٌ وَمَنْ كَانَتْ الدُّنْيَا هَمَّهُ جَعَلَ اللَّهُ فَقْرَهُ بَيْنَ عَيْنَيْهِ وَفَرَّقَ عَلَيْهِ شَمْلَهُ وَلَمْ يَأْتِهِ مِنْ الدُّنْيَا إِلَّا مَا قُدِّرَ لَهُ

Whoever is concerned about the Hereafter, Allah will place richness in his heart, bring his affairs together, and the world will come to him although he is reluctant for it. Whoever is concerned about the world, Allah will place poverty between his eyes, disorder his affairs, and he will get nothing of the world but what is decreed for him.

Source: Sunan al-Tirmidhī 2465, Grade: Sahih

Abdullah ibn Mas’ud reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ جَعَلَ الْهُمُومَ هَمًّا وَاحِدًا هَمَّ الْمَعَادِ كَفَاهُ اللَّهُ هَمَّ دُنْيَاهُ وَمَنْ تَشَعَّبَتْ بِهِ الْهُمُومُ فِي أَحْوَالِ الدُّنْيَا لَمْ يُبَالِ اللَّهُ فِي أَيِّ أَوْدِيَتِهِ هَلَكَ

Whoever focuses on only one concern, the afterlife, Allah will be enough for his concerns in the world. Whoever scatters his concerns among the matters of the world, it does not matter to Allah in which valley he meets his demise.

Source: Sunan Ibn Mājah 4106, Grade: Hasan

Ibn Umar reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ جَعَلَ الْهَمَّ هَمًّا وَاحِدًا يعني الآخرة كَفَاهُ اللهُ هَمَّ دُنْيَاهُ وَمَنْ تَشَعِّبَتْهُ الْهُمُومُ لَمْ يُبَالِ اللهُ فِي أَيِّ أَوْدِيَةِ الدُّنْيَا هَلَكَ

Whoever makes his concerns only one concern, the Hereafter, Allah will be enough for his concerns in the world. Whoever scatters his concerns, it does not matter to Allah in which valley of the world he meets his demise.

Source: Shu’ab al-Imān 9857, Grade: Hasan li ghayrihi