Assalamu Alikum,

Allah SWA has promised the believer who does righteous deeds reward in this world, as well as the greater reward which awaits him in the Hereafter.

Allah says (interpretation of the meaning):
“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”
[al-Nahl 16:97]

Ibn al-Qayyim said: Allah guarantees to those who believe and do righteous deeds reward in this world with a good life, and Paradise on the Day of Resurrection.

The rewards in this life for some good deeds have been mentioned in the Qur’aan and Sunnah. These include the following:

1 – Spending for the sake of Allah

Allah says:
“and whatsoever you spend of anything (in Allah’s Cause), He will replace it. And He is the Best of providers”
[Saba’ 34:39]

It was narrated that Abu Hurayrah said: The Messenger of Allah (peace and blessings of Allah be upon him) said: “Allah says: ‘O son of Adam, spend and I will spend on you."
(Narrated by al-Bukhaari, 4407; Muslim, 993).

Spending for the sake of Allaah is one of the means of increasing one’s provision.

2 – Being easy-going with a debtor who is facing hardship, concealing a Muslim’s faults and helping him.

It was narrated that Abu Hurayrah said:
The Messenger of Allah (peace and blessings of Allah be upon him) said:
“Whoever relieves a Muslim of some distress in this world, Allah will relieve him of some distress on the Day of Resurrection.

Whoever is easy-going with a debtor who is facing hardship, Allah will make it easy for him in this world and in the Hereafter.
And whoever conceals a Muslim’s faults, Allah will conceal his faults in this world and the Hereafter. And Allah will help His slave so long as His slave helps his brother.”
Narrated by Muslim, 2699.

3 – Being humble for the sake of Allah.

It was narrated from Abu Hurayrah that the Messenger of Allah (peace and blessings of Allaah be upon him) said:
“Wealth never decreases because of charity. No person shows forbearance but Allah will honour him and no one is humble for the sake of Allah but Allah will raise him in status.”

Narrated by Muslim, 2588.

Al-Mubaarakfoori said:
“raise him in status” means in this world and in the Hereafter.
Tuhfat al-Ahwadhi, 6/150.

4 – Upholding the ties of kinship

It was narrated that Anas ibn Maalik (may Allaah be pleased with him) said: I heard the Messenger of Allaah (peace and blessings of Allaah be upon him) say:

“Whoever would like to have his provision increased or his lifespan extended, let him uphold the ties of kinship.”
Narrated by al-Bukhaari, 1961; Muslim, 2557.

With regard to the extension of one’s lifespan there is a well-known scholarly discussion, which is that lifespans and provisions are decreed and cannot increase or decrease.
“when their term comes, neither can they delay it nor can they advance it an hour (or a moment)” [Yoonus 10:49 – interpretation of the meaning].

The scholars came up with several answers to this issue, the most correct of which:

That this refers to an increase of blessing during one's lifetime, being guided to do good deeds and to make use of one's times in ways that will be of benefit in the Hereafter and to make the most of his time for the sake of Allah.

Etc
Allah knows best. Assalamu Alikum

Jummuat Mubarak!