question #3 Sahih al-Bukhari 844, Book 10, Hadith 236 : How does the concept of divine decree and human effort relate to the supplication mentioned in the hadith?

(the clerk of Al-Mughira bin Shu`ba) Once Al-Mughira dictated to me in a letter addressed to
Muawiya that the Prophet (ﷺ) used to say after every compulsory prayer, “La ilaha illa l-lahu wahdahu la
sharika lahu, lahu l-mulku wa lahu l-hamdu, wa huwa `ala kulli shay’in qadir. Allahumma la mani`a
lima a`taita, wa la mu`tiya lima mana`ta, wa la yanfa`u dhal-jaddi minka l-jadd. [There is no Deity but
Allah, Alone, no Partner to Him. His is the Kingdom and all praise, and Omnipotent is he. O Allah!
Nobody can hold back what you gave, nobody can give what You held back, and no struggler’s effort
can benefit against You].” And Al-Hasan said, “Al-jadd’ means prosperity [??].”