O My Dear Beloved Son, read this supplication at different times and especially after your prayer:

O God, I ask of You complete blessings, lasting protection from sin, comprehensive mercy, acquisition of well-being [in this world and in the next], the best provision, the happiest life, the most complete favour, the most generous blessing, the sweetest grace, and the closest gentleness.

O God, be for us and not against us.  O God, seal our lives with happiness and good fortune, realise our aspirations accompanied with further increase.  Combine our mornings and evenings with safety and make Your compassion our mercy and last resort and pour the best of Your forgiveness over our sins and favour us with the reform of our defects.  Make piety our provision and grant us interpretive judgment in Your religion, and make us depend on You and have confidence only in You.

O God, make us firm on the path of steadfastness, and safeguard us in this world from matters that will bring shame on the Day of Judgment, and lighten for us the burden of our sins, and grant us lives of the righteous, and protect us from the evil of the evil ones.  Save our necks and the necks of our mothers, fathers, brothers and sisters from the fire of Hell by Your compassion, O Most Powerful One, Most Forgiving, Most Generous, Concealing of our faults; O You, Most Knowledgeable, Most Overwhelming, O God! O God! O God!  By Your Mercy, O Most Merciful of the merciful, O First before the firsts, Last after the lasts, O Possessor of Strength, Everlasting, Compassionate to the destitute, Most Compassionate of those who are compassionate.  There is no god but You, glory be to You, verily I am of the wrongdoers.

And may God bless our Prophet Muhammad and his Family and Companions.  All praise belongs to God, the Lord and Cherisher of all the worlds.

~ Imam Abu Hamid al-Ghazali (Dear Beloved Son, 24th Counsel)