Opening the verse
ذَٰلِكَ ٱلَّذِى يُبَشِّرُ ٱللَّهُ عِبَادَهُ ٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّـٰلِحَـٰتِ ۗ قُل لَّآ أَسْـَٔلُكُمْ عَلَيْهِ أَجْرًا إِلَّا ٱلْمَوَدَّةَ فِى ٱلْقُرْبَىٰ ۗ وَمَن يَقْتَرِفْ حَسَنَةً نَّزِدْ لَهُۥ فِيهَا حُسْنًا ۚ إِنَّ ٱللَّهَ غَفُورٌ شَكُورٌ
It is that of which Allāh gives good tidings to His servants who believe and do righteous deeds. Say, [O Muḥammad], "I do not ask you for it [i.e., this message] any payment [but] only good will through [i.e., due to] kinship." And whoever commits a good deed - We will increase for him good therein. Indeed, Allāh is Forgiving and Appreciative.
Narrated Tawus:Ibn `Abbas recited the Qur'anic Verse:--'Except to be kind to me for my kin-ship to you--" (42.23) Sa`id bin Jubair said, "(The Verse implies) the kinship of Muhammad." Ibn `Abbas said, "There was not a single house (i.e. sub-tribe) of Quraish but had a kinship to the Prophet (ﷺ) and so the above Verse was revealed in this connection, and its interpretation is: 'O Quraish! You should keep good relation between me (i.e. Muhammad) and you
Narrated Ibn `Abbas:That he was asked (regarding): "Except to be kind to me for my Kinship with you.' (42.23) Sa`id bin Zubair (who was present then) said, "It means here (to show what is due for) the relatives of Muhammad." On that Ibn `Abbas said: you have hurried in giving the answer! There was no branch of the tribe of Quraish but the Prophet (ﷺ) had relatives therein. The Prophet (ﷺ) said, "I do not want anything from (you ) except to be Kind to me for my Kinship with you
Narrated Tawus:Ibn 'Abbas was asked about this Ayah: Say: "No reward do I ask of you for this except to be kind for my kinship with you (42:23)." So Sa'eed bin Jubair said: 'To be kind to the family of Muhammad.' Ibn 'Abbas replied: 'You know that there was no family of the Quraish except that the Messenger of Allah (ﷺ) had some relatives among them.' He said: 'Except that you should uphold ties of kinship that exist between me and you