Musannaf Ibn Abi Shayba 33:589

'Abd al-Samad ibn 'Abd al-Warith narrated to us, from Hammad ibn Salama, from Abu 'Imran al-Jawni, from Ibn Abi Musa, from his father: "And for he who has feared the position of his Lord are two gardens." He said: "Two gardens of gold for the forerunners, and two gardens of silver for those who follow."