A virtue of constantly seeking forgiveness (istighfar):

فَقُلْتُ اسْتَغْفِرُوا رَبَّكُمْ إِنَّهُ كَانَ غَفَّارًا
“I said (to them): ‘Ask forgiveness from your Lord; Verily, He is Oft-Forgiving;
يُرْسِلِ السَّمَاءَ عَلَيْكُمْ مِدْرَارًا
‘He will send rain to you in abundance;
وَيُمْدِدْكُمْ بِأَمْوَالٍ وَبَنِينَ وَيَجْعَلْ لَكُمْ جَنَّاتٍ وَيَجْعَلْ لَكُمْ أَنْهَارًا
‘And give you increase in wealth and children, and bestow on you gardens and bestow on you rivers.”

(سورة نوح: ١٢-١٠)

A man complained to al-Hasan about a drought, and he said to him: “Pray to Allaah for forgiveness.” Another man complained to him of poverty and he said to him: “Pray to Allaah to forgive you.” Another man said to him: “Pray to Allaah to bless me with a child.” He said: “Pray to Allaah for forgiveness.” Another complained to him that his garden was dry. He said to him: “Pray to Allaah for forgiveness.” We asked him about that and he said: “This is not my personal opinion, for Allaah says in Soorat Nooh (interpretation of the meaning): ‘Ask forgiveness from your Lord, verily, He is Oft‑Forgiving; He will send rain to you in abundance. And give you increase in wealth and children, and bestow on you gardens and bestow on you rivers.”

‘And give you increase in wealth and children, and bestow on you gardens and bestow on you rivers.”

Tafseer al-Qurtubi, 18/301-302