Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:5226[Chain 1] Mūsá b. Ismāʿīl > Ḥammād [Chain 2] Muslim > Hishām > Ḥammād / ān Ibn Abū Sulaymān > Zayd b. Wahb > Abū Dhar

The Prophet ﷺ addressed me, saying: O AbuDharr! I replied: At thy service and at thy pleasure, Messenger of Allah! may I be ransom for thee.  

أبو داود:٥٢٢٦حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ حَدَّثَنَا حَمَّادٌ ح وَحَدَّثَنَا مُسْلِمٌ حَدَّثَنَا هِشَامٌ عَنْ حَمَّادٍ يَعْنِيَانِ ابْنَ أَبِي سُلَيْمَانَ عَنْ زَيْدِ بْنِ وَهْبٍ عَنْ أَبِي ذَرٍّ قَالَ

قَالَ النَّبِيُّ ﷺ يَا أَبَا ذَرٍّ فَقُلْتُ لَبَّيْكَ وَسَعْدَيْكَ يَا رَسُولَ اللَّهِ وَأَنَا فِدَاؤُكَ