Not graded
Hisn al-Muslim (Fortress of the Muslim) 185
((إِذَا دُعِيَ أَحَدُكُمْ فَلْيُجِبْ، فَإِنْ كَانَ صَائِماً فَلْيُصَلِّ، وَإِنْ كَانَ مُفْطِراً فَلْيَطْعَمْ)) ، وَمَعْنَى فَلْيُصَلِّ أَيْ فَلْيَدْعُ.
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Cited in Hisn al-Muslim (Fortress of the Muslim) (No. 185).