Musannaf Ibn Abi Shaybah 8916 — Laylat al-Qadr and which night it is

Zirr bin Hubaysh said: When it is the 27th night of Ramadan, take a ritual bath (ghusl). On that night, if any of you can delay his iftar until the pre-dawn (sahar), let him do so; and he should break his fast that day with diluted milk.