Musnad Ahmad Hadith 18370

It is narrated from Nu’man (may Allah be pleased with him) that he heard the Messenger of Allah (ﷺ) say with his own ears: The example of those who establish the limits set by Allah and those who are lenient regarding them is like a people who set out on a sea journey. Some of them sit in the lower part (of the boat) and some sit in the upper part. The people in the lower part have to go up to get water, and some water spills on those above. Seeing this, the people above say, “Now we will not let you come up; you cause us trouble.” The people below reply, “Fine, then we will make a hole in the bottom of the boat and get water from there.” Now, if the people above hold their hands and stop them from this, then all will be saved; otherwise, all will drown. The previous hadith is also narrated through this second chain of transmission.