The Quran

فَإِن رَجَعَكَ اللَّهُ إِلىٰ طائِفَةٍ مِنهُم فَاستَأذَنوكَ لِلخُروجِ فَقُل لَن تَخرُجوا مَعِيَ أَبَدًا وَلَن تُقاتِلوا مَعِيَ عَدُوًّا ۖ إِنَّكُم رَضيتُم بِالقُعودِ أَوَّلَ مَرَّةٍ فَاقعُدوا مَعَ الخالِفينَ

Muhammad Asad

Hence, [O Prophet,] if God brings thee again face to face with some of them,¹ and then they ask thy leave to go forth [to war with thee], say: "Never shall you go forth with me, nor shall you fight an enemy together with me! Behold, you were well-pleased to stay at home on that first occasion: stay at home, then, with, those who [are obliged to] remain behind!²

Lit., "if God brings thee back [from the campaign] to group of them" - i.e., to those a hypocrites who remained at home under false pretences.
I.e., with the old men, the women, the children and the sick, who are not able or not expected to go to war (Manar X, 662).