Nay! he (Muhammad SAW) has come with the truth (i.e. Allah's Religion

﴿بَلۡ جَآءَ بِٱلۡحَقِّ وَصَدَّقَ ٱلۡمُرۡسَلِينَ ﴾
[الصَّافَات: 37]

Nay! he (Muhammad SAW) has come with the truth (i.e. Allah's Religion - Islamic Monotheism and this Quran) and he confirms the Messengers (before him who brought Allah's religion - Islamic Monotheism)

﴿بل جاء بالحق وصدق المرسلين﴾ [الصَّافَات: 37]

Al Bilal Muhammad Et Al
No, he has come with the truth, and he confirms the messengers

Ali Bakhtiari Nejad
No, but he brought the truth and confirmed the messengers (before him)

Ali Quli Qarai
Indeed, he has brought [them] the truth, and confirmed the [earlier] apostles

Ali Unal
No! Rather he has brought (you) the truth and confirms those (Messengers) sent (before him)

Hamid S Aziz
Nay, he has come with the truth and verified the (messages of) the Messengers sent before him

John Medows Rodwell
Nay, he cometh with truth and confirmeth the Sent Ones of old

Literal
But He came with the truth and he confirmed the messengers

Mir Anees Original
No, he has come with the truth and confirms the messengers (who had come before him)

Mir Aneesuddin
No, he has come with the truth and confirms the messengers (who had come before him)