Al-Hijr 15:99 واعبد ربك حتى ياتيك اليقين ٩٩
وَٱعۡبُدۡ
رَبَّكَ
حَتَّىٰ
يَأۡتِيَكَ
ٱلۡيَقِينُ
٩٩
واستمِرَّ في عبادة ربك مدة حياتك حتى يأتيك اليقين، وهو الموت. وامتثل رسول الله صلى الله عليه وسلم أمر ربه، فلم يزل دائبًا في عبادة الله، حتى أتاه اليقين من ربه.
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Ibn Kathir (Abridged)
The Command to proclaim the Truth openly
Allah commanded His Messenger to convey what He sent him with, to proclaim and spread the Message, which means confronting the idolators with it. Ibn `Abbas said that the Ayah,
فَاصْدَعْ بِمَا تُؤْمَرُ
(Therefore openly proclaim that what you have been commanded
…The Command to proclaim the Truth openly
Allah commanded His Messenger to convey what He sent him with, to proclaim and spread the Message, which means
…