٣. ٱتَّبِعُوا۟ مَآ أُنزِلَ إِلَيْكُم مِّن رَّبِّكُمْ وَلَا تَتَّبِعُوا۟ مِن دُونِهِۦٓ أَوْلِيَآءَ ۗ قَلِيلًا مَّا تَذَكَّرُونَ
[3] O people, follow what has been sent down to you from your Lord and do not follow other patrons beside Him.4 But you seldom take admonition
4This is the main theme of this Surah. It invites the people to accept the Guidance that has been sent down by Allah through His Messengers, for this alone can impart the true knowledge to man about himself and the universe, and tell him the aim and object of his life and teach him the principles on which to build his morality, social life, culture and civilization. Man should acknowledge Allah alone as his Guide and follow only His Guidance that has been sent down through His Messengers. 'The discourse warns that it is basically wrong to turn to anyone other than Allah for guidance, for this has always resulted in utter ruin and will inevitably lead to ruin.
Here the word "patrons" has been used for all those beings whom a man follows instead of Allah, whether he praises them as saints or curses them as satans. (For further explanation see E.N. 6 of XLII).