It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) was standing at Arafat. When he (peace and blessings be upon him) said "Labbayk Allahumma labbayk (Here I am, O Allah, here I am)", he (also) said: "True good is only the good of the Hereafter."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Dawud bin Abi Hind except Mahbub bin al-Hasan."
Hadith Referenceالمعجم الأوسط / باب الميم / 5419
Hadith Takhrij«أخرجه ابن الجارود فى «المنتقى» برقم: 517، وابن خزيمة فى «صحيحه» برقم: 2831، والحاكم فى «المستدرك» برقم: 1713، والبيهقي فى «السنن الكبرى» برقم: 9125»