The Prophet ﷺ said: If anyone omits the Friday prayer without excuse, he must give a dinar in alms, or if he does not have as much, then half a dinar. Abu Dawud said: Khalid b. Qais reported this tradition in this manner, but he disagreed in respect of chain (of transmitters) and agreed in respect of the text.  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ تَرَكَ الْجُمُعَةَ مِنْ غَيْرِ عُذْرٍ فَلْيَتَصَدَّقْ بِدِينَارٍ فَإِنْ لَمْ يَجِدْ فَبِنِصْفِ دِينَارٍ  

The Prophet ﷺ said: If anyone omits the Friday prayer without excuse, he must give one dirham or half a dirham, or one sa' or half a sa' of wheat, in alms. Abu Dawud said: Sa'id b. Bashir reported this tradition in a like manner, except that he narrated "one mudd or half mudd" (instead of sa'). He narrated it from Samurah. Abu Dawud said: I heard Ahmad bin Hanbal being asked about the differences over the narration of this Hadith. He said: "Hammam has a stronger memory - in my opinion - than Ayyub."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ فَاتَتْهُ الْجُمُعَةُ مِنْ غَيْرِ عُذْرٍ فَلْيَتَصَدَّقْ بِدِرْهَمٍ أَوْ نِصْفِ دِرْهَمٍ أَوْ صَاعِ حِنْطَةٍ أَوْ نِصْفِ صَاعٍ