سَافَرْتُ صَبَاحًا: ṣabāḥan is a time adverbial answering when.
سَافَرْتُ طَلَبًا لِلْعِلْمِ: ṭalaban is a reason complement answering why.
These are added examples comparing time and purpose.
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Adverbial versus Reason
Al-Mafʿūl Lahu: Expressing the Reason for an Action
سَافَرْتُ صَبَاحًا: ṣabāḥan is a time adverbial answering when.
سَافَرْتُ طَلَبًا لِلْعِلْمِ: ṭalaban is a reason complement answering why.
These are added examples comparing time and purpose.