﴿ ٱلْحَقُّ مِن رَّبِّكَ ۖ فَلَا تَكُونَنَّ مِنَ ٱلْمُمْتَرِينَ ﴾

“the truth from thy Sustainer! Be not, then, among the doubters:”

The truth comes from your Lord; then be not among the doubters. i.e. 'after the suns of certainty have appeared to you do not yield to the results of mere guessing'. The address is to [the Prophet] but what is intended by it is the community.