Hasan al-Basree 110 AH (may Allah have mercy on him) said:

“O youth! Seek the Hereafter, for we often see people pursuing the Hereafter and finding it as well as the dunyah (worldly well being), but we have never seen anyone pursue the dunyah and gain the Hereafter as well as the dunyah.”

Source: az-Zuhd al-Kabir p. 65