question #1 Sahih Muslim 234b, Book 2, Hadith 21 : What is the significance of the testimony of faith in Islam after performing ablution?

Verily the Messenger of Allah (ﷺ) said and then narrated (the hadith) like one (mentioned above) except (this) that he said: He who performed ablution and said: I testify that there is no god but Allah, the One, there is no associate with Him and I testify that Muhammad is His servant and His Messenger.