(1) باب مَا جَاءَ فِي إِجَابَةِ الدَّعْوَةِ
The tradition mentioned above has also been transmitted by Ibn 'Umar to the same effect through a different chain of narrators. This version has the additional words:
If he is not fasting, he should eat, and if he is fasting, he should leave it. (DE)
Reference (DE): Sunan Abi Dawud 3737 (DE)
In-book reference (DE): Book 28, Hadith 2 (DE)
English translation (DE): Book 27, Hadith 3728 (DE)