"That, then, would be a losing return," meaning: a false one; that is: it will not come to pass.
Muhammad said: It is also said: The meaning is: That, then, would be a return in which one loses.
﴿تِلْكَ إِذا كرة خاسرة﴾ كَاذِبَةٌ؛ أَيْ: لَيْسَتْ بِكَائِنَةٍ.
قَالَ مُحَمَّدٌ: وَقِيلَ: الْمَعْنَى: تِلْكَ إِذًا رجعةٌ يخسر فِيهَا،