ذَٰلِكَ ٱلَّذِى يُبَشِّرُ ٱللَّهُ عِبَادَهُ ٱلَّذِينَ ءَامَنُوا وَعَمِلُوا ٱلصَّـٰلِحَـٰتِ ۗ قُل لَّآ أَسْـَٔلُكُمْ عَلَيْهِ أَجْرًا إِلَّا ٱلْمَوَدَّةَ فِى ٱلْقُرْبَىٰ ۗ وَمَن يَقْتَرِفْ حَسَنَةً نَّزِدْ لَهُ فِيهَا حُسْنًا ۚ إِنَّ ٱللَّهَ غَفُورٌ شَكُورٌ

‘I do not ask any reward for that, except (that I am inviting you to God because) of love of kinship.’ The Prophet uttered these words at a time when the people of his own tribe, the Quraysh, were putting impediments in the way of his dawah activity. Under these circumstances, the aforesaid statement was meant to convey that they might not accept the Prophet’s religion, if they did not want to, but they should at least take into account their relationship with him and refrain from tormenting him. In other words, he meant to say that even if they had religious differences with him, they should maintain a proper level of politeness, decency and moral values. In this way it was indirectly established that the opponents of his call for Truth were not only his personal opponents but were also morally guilty. They proved themselves wrong according to moral standards, the importance of which was established among them too.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (42:23)