The Messenger has believed in what was revealed to him from his (2:285)

﴿آمَنَ الرَّسُولُ بِمَا أُنزِلَ إِلَيْهِ مِن رَّبِّهِ وَالْمُؤْمِنُونَ ۚ كُلٌّ آمَنَ بِاللَّهِ وَمَلَائِكَتِهِ وَكُتُبِهِ وَرُسُلِهِ لَا نُفَرِّقُ بَيْنَ أَحَدٍ مِّن رُّسُلِهِ ۚ وَقَالُوا سَمِعْنَا وَأَطَعْنَا ۖ غُفْرَانَكَ رَبَّنَا وَإِلَيْكَ الْمَصِيرُ﴾
[ البقرة: 285]

2:285 The Messenger has believed in what was revealed to him from his Lord, and [so have] the believers. All of them have believed in Allah and His angels and His books and His messengers, [saying], "We make no distinction between any of His messengers." And they say, "We hear and we obey. [We seek] Your forgiveness, our Lord, and to You is the [final] destination."

The Prophet Muhammad ( peace be upon him ) believes in everything that was revealed to him by his Lord, as do the believers.
All of them believe in Allah, all His angels, all His books that He revealed to the various prophets and all His messengers that He sent.
They believe in such messengers without making any distinction between them.
They say, ‘We have heard your instructions and prohibitions, and we obey You by following Your instructions and leaving Your prohibitions.
We ask You to forgive us, O Lord, for in all our matters we return to You alone’.

The Messenger (Muhammad SAW) believes in what has been sent down to him from his Lord, and (so do) the believers. Each one believes in Allah, His Angels, His Books, and His Messengers. They say, "We make no distinction between one another of His Messengers" - and they say, "We hear, and we obey. (We seek) Your Forgiveness, our Lord, and to You is the return (of all)."

phonetic Transliteration

Amana alrrasoolu bima onzila ilayhi min rabbihi waalmuminoona kullun amana biAllahi wamalaikatihi wakutubihi warusulihi la nufarriqu bayna ahadin min rusulihi waqaloo samiAAna waataAAna ghufranaka rabbana wailayka almaseeru

Abdullah Yusuf Ali - Translation

The Messenger believeth in what hath been revealed to him from his Lord, as do the men of faith. Each one (of them) believeth in Allah, His angels, His books, and His messengers. "We make no distinction (they say) between one and another of His messengers." And they say: "We hear, and we obey: (We seek) Thy forgiveness, our Lord, and to Thee is the end of all journeys."

Safi-ur-Rahman al-Mubarakpuri

The Messenger believes in what has been sent down to him from his Lord, and (so do) the believers. Each one believes in Allah, His Angels, His Books, and His Messengers. (They say,) "We make no distinction between one another of His Messengers ـ and they say, "We hear, and we obey. (We seek) Your forgiveness, our Lord, and to You is the return (of all)."

Page 49 English transliteration