Al-Matalib al-'Aliyah 2912 — The religion is ease

It is narrated from a Companion (may Allah be pleased with him) of the tribe of Aslam that there were three men among us who kept the company of the Prophet (peace and blessings be upon him): Buraydah, Mihjan and Sukbah (may Allah be pleased with them). Sayyiduna Mihjan said to Sayyiduna Buraydah: "Do you not pray the way Sukbah prays (with such fervour)?" He replied: "No, (I do not do so, because) I remember that I was returning with the Messenger of Allah (peace and blessings be upon him) from Uhud, and we were walking together with my hand in his (peace and blessings be upon him) blessed hand. Meanwhile the Prophet (peace and blessings be upon him) saw a man praying (with great elaboration), and he asked: 'Do you consider him to be striving hard (in worship)? Do you consider him truthful (in his claim)?' At that I began to praise and commend that man, but when we came close to him, he (peace and blessings be upon him) pulled his hand away from mine and said: 'Woe to you! Be silent; do not let him hear (this praise of yours), or you will destroy him. Indeed, the best of your religion is what is easiest (and based on moderation).'"
Imam Musaddad recorded it in his Musnad; its chain contains an unnamed narrator, yet its basis is established by other supporting reports.