on a fourteenth nigh

Narrated Jarir bin Abdullah (Radi-Allahu 'anhu):

We were in the company of the Prophet (Sallallahu 'Alaihi Wa Sallam) on a
fourteenth night (of the lunar month), and he looked at the (full) moon and
said, "You will see your Lord as you see this moon, and you will have no
trouble in looking at Him. So, whoever can, should not miss the offering of
prayers before sunrise (Fajr prayer) and before sunset (Asr prayer)." Then
the Prophet (Sallallahu 'Alaihi Wa Sallam) recited:

'And celebrate the praises of your Lord before the rising of the sun and
before (its) setting.' (50.39)

Bukhari Vol. 6 : No. 374