This is in fact a Commandment from your Lord; so you should - Surah Al-Baqarah ayat 147 in English

﴿ٱلۡحَقُّ مِن رَّبِّكَ فَلَا تَكُونَنَّ مِنَ ٱلۡمُمۡتَرِينَ ﴾
[البَقَرَة: 147]

This is in fact a Commandment from your Lord; so you should not have any doubt concerning this

﴿الحق من ربك فلا تكونن من الممترين﴾ [البَقَرَة: 147]

Abdel Haleem
The truth is from your Lord, so do not be one of those who doubt

Abdul Hye
(This is) the truth from your Lord. So don’t be of those who doubt

Abdullah Yusuf Ali
The Truth is from thy Lord; so be not at all in doubt

Abdul Majid Daryabadi
The truth is from thy Lord; be then thou not of the doubters

Ahmed Ali
The truth is from your Lord, so be not among those who are sceptics

Aisha Bewley
The truth is from your Lord, so on no account be among the doubters

A. J. Arberry
The truth comes from thy Lord; then be not among the doubters

Ali Quli Qarai
This is the truth from your Lord; so do not be among the skeptics