O Ye who believe! Put not yourselves forward before Allah and His Messenger; but fear Allah: for Allah is He Who hears and knows all things.
Several shades of meaning are implied:
• do not make yourselves conspicuous in word or
deed when in the presence of Allah (e.g. in a
Mosque, or at Prayers or religious assemblies):
• do not anticipate in word or deed what your
Leader (Allah’s Messenger) may say or do;
• do not be impatient, trying to hasten things
before the time is ripe, of which the best Judge is
Allah, Who speaks through His Messenger. Be
reverent in all things, as in the presence of Allah:
for He hears and sees all things.
• Look to the Quran and the Sunnah of the Prophet
(peace be on him) for guidance and let nothing
else take precedence of them. (R).
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (surah 49 verse 1). Quran Arabic with English Translation & Commentary (Tafsir) by Abdullah Yusuf Ali, Free Download (quran4u.com)