Allāh-umma innā nasta‘ī nuka wa nastaghfiru-ka wa nu’ minu bi-ka wa natawakkalu ‘alaika wa nuthnī ‘alaik-alkhaira wa nashkuru-ka wa lā nakfuru ka wa nakhla‘u wa natruku man yafjuru-k; Allāhumma iyyā-ka na‘budu wa la-ka nuṣallī wa nasjudu wailai-ka nas‘ā wa naḥfidu wa narjū raḥmata ka wa nakh shā ‘adhāba-ka inna ‘adhāba-ka bi l-kuffāri mulḥiq.
O Allāh! We beseech Thee for help, and seek Thy protection and believe in Thee and rely on Thee and extol Thee and are thankful to Thee and are not ungrateful to Thee and we declare ourselves clear of, and forsake, him who disobeys Thee. O Allāh! Thee do we serve and for Thee do we pray and prostrate ourselves and to Thee do we betake ourselves and to obey Thee we are quick, and Thy mercy do we hope for, and Thy punishment do we fear, for Thy punishment overtakes the unbelievers.

Dhikr after finishing prayer

There is no reference in any ḥadīth to the Holy Prophet raising up the hands for supplication after offering prayers, as is the general practice, but some kinds of dhikr are recommended :

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Astaghfiru-llāha Rabbī min kulli dhanb-in wa atūbu ilai-h.
I seek the protection of Allāh my Lord, from every fault and turn to Him.
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Allāh-umma anta-s-salāmu wa min-ka-s-salāmu, tabārakta yā Dha-l-Jalāli wa-l-Ikrām.
O Allāh! Thou art the Author of peace, and from Thee comes peace, blessed art Thou, O Lord of Glory and Honour.