I heard the Messenger of Allah (ﷺ) saying (the version of Sulayman has: The Messenger of Allah (ﷺ) used to say) after his prayer:-

"O Allah, our Lord and Lord of everything, I bear witness that Thou art the Lord alone Who hast no partner; O Allah, Our Lord and Lord of everything, I bear witness that Muhammad is Thy servant and Thy apostle ; O Allah, our Lord and Lord of everything, I bear witness that all the servants are brethren; O Allah, our Lord and Lord of everything make me sincere to Thee, and my family too at every moment, in this world and in the world hereafter, O Possessor of glory and honour, listen to me and answer. Allah is incomparably great. O Allah, Light of the heavens and of the earth".

The narrator Sulaiman b. Dawud said: "Lord of the heavens and of the earth, Allah is incomparably great. Allah is sufficient for me; and the excellent guardian is He; Allah is incomparably great.