Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: A young man used to serve the Prophet (peace and blessings be upon him) and was quick in attending to his (peace and blessings be upon him) needs. So he (peace and blessings be upon him) said to him: "Ask me for something you need." He said: "Supplicate to Allah Almighty for Paradise for me." The narrator said: He (peace and blessings be upon him) raised his head, took a breath and said: "Very well, but help me (in that) by prostrating abundantly."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2016