QURAN-SURAH-BAQARA-VERSE-51 40 NIGHTS & HAZRAT MOOSAA [ALAIEHIS SALAAM]

And when We made a commitment with Moosa [Moses] [Hazrat Moosa [Alaiehis Salaam]  for forty nights – then behind him you started worshiping the calf, and you were unjust

وَإِذْ وَاعَدْنَا مُوسَىٰ أَرْ‌بَعِينَ لَيْلَةً ثُمَّ اتَّخَذْتُمُ الْعِجْلَ مِن بَعْدِهِ وَأَنتُمْ ظَالِمُونَ ﴿٥١﴾‎