وَلِلَّذِي سَأَلْتَ -أَكْرَمَكَ اللَّهُ- حِينَ رَجَعْتُ إِلَى تَدَبُّرِهِ، وَمَا تَؤُولُ إِلَيْهِ الْحَالُ -إِنْ شَاءَ اللَّهُ- عَاقِبَةٌ مَحْمُودَةٌ، وَمَنْفَعَةٌ مَوْجُودَةٌ،
When I considered your request and what might come of it—may Allah honor you—I found, Allah willing, a commendable outcome and attainable benefit.
“Tadabbur” involves considering both the demands and likely result of the task. Imam Muslim is evaluating its scholarly value, not merely agreeing to gather material.