When you reach forty, Allah gave you a duʿā: thank Me, thank my parents, make my children righteous. Memorize it before forty; live it after.

Sūrah al-Aḥqāf 46:15 is one of the most generationally complete verses in the Qurʾan, structuring the believer's relationship with his past (parents), present (himself), and future (children) in one extended duʿā. Read the architecture carefully. First, the verse opens with the parental-iḥsān command, repeating the principle from Sūrah Luqmān but adding specific detail: 'wa-waṣṣaynă al-insāna bi-wālidayhi iḥsānan'. And We have enjoined upon man, concerning his parents, excellence. Then the detail of the mother's labor: 'ḥamalat-hu ummuhu karhan wa-waḍaʿat-hu karhan'. His mother carried him in hardship, and gave birth to him in hardship. The Arabic karhan, hardship, intensifies the verse's earlier wahn from Luqmān 31:14. Then: 'wa-ḥamluhu wa-fiṣăluhu thalăthūn shahran'. And his bearing and his weaning is thirty months. The classical scholars derived from this verse, combined with 31:14 (which named two years of weaning) and 2:233 (which named two years), the figure of nine months pregnancy. The fiqh of paternity was partly built on this verse. Then the verse names a specific life-milestone: 'ḥattă idhă balagha ashaḍahu wa-balagha arbaʿīna sanatan'. Until when he reaches his full maturity (ashaḍ) and reaches forty years. The Arabic ashaḍ is from sh-d-d, strength; it indicates the peak adult strength, the soul's mature integration. The classical scholars (Ibn Kathīr, Ibn al-Qayyim) noted that forty is, by Qurʾanic indication, the age at which the soul is fully formed; the prophethood of Muḥammad ﷺ began at forty (the same age); the responsibility of the mature believer takes its full weight at forty. Then the duʿā the verse gives: 'qăla rabbi awziʿnī an a-shkura niʿmataka allatī anʿamta ʿalayya wa-ʿală wālidayya, wa-an aʿmala ṣăliḥan tarḍăhu, wa-aṣliḥ lī fī dhurriyyatī, innī tubtu ilayka wa-innī min al-muslimīn'. He says: My Lord, enable me to thank Your favor that You bestowed upon me and my parents, and to do righteous deeds that You will be pleased with; rectify my offspring for me; indeed I have repented to You, and indeed I am among the submitting. Read the six requests. First: enable me to thank Your favor on me. (Gratitude to Allah for personal blessings.) Second: enable me to thank Your favor on my parents. (Gratitude for what Allah did for them, which produced you.) Third: enable me to do righteous deeds that please You. (Action in the present.) Fourth: rectify my offspring for me. (Righteousness for the future.) Fifth: I have repented to You. (Declaration of tawbah.) Sixth: I am among the submitting. (Declaration of islām.) Six requests spanning three generations and three time-frames (past, present, future). The duʿā is, in concentrated form, the believer's structural prayer at the age of full maturity. Now consider this duʿā's place in your life. If you are under forty, memorize it now; you will need it when you arrive. If you are at or past forty, recite it daily as part of your morning and evening duʿās. The classical scholars including Ibn al-Qayyim recommended it as one of the four or five core duʿās of the mature believer. The believer who has reached forty has, statistically, lived more than half his life; his parents may still be living (or may have passed); his children are present (or expected); his deeds are accumulating (or being squandered). The duʿā addresses every layer at once. Today, if you are at forty or beyond, recite the duʿā with full attention to each clause. If you are not yet there, memorize it. The destination of forty awaits; the prayer Allah gave you is ready. Pray today: Rabbi awziʿnī an a-shkura niʿmataka allatī anʿamta ʿalayya wa-ʿală wālidayya, wa-an aʿmala ṣăliḥan tarḍăhu, wa-aṣliḥ lī fī dhurriyyatī, innī tubtu ilayka wa-innī min al-muslimīn. The verse is the prayer; the prayer is the practice; the practice is the mature believer's daily life.