Al-Baqara 2:238

Be mindful of the prayers[131], especially the middle prayer; and stand before Allah in complete devotion[132].

[131] The five obligatory daily Prayers.
[132] Prayers are mentioned in the midst of marital affair rulings, because of the hurtful feelings divorce can leave. Hence, people are reminded of the Hereafter, whereby they should not ‘overlook kindness’ among themselves by this reminder of accountability.

Maintain with care the [obligatory] prayers and [in particular] the middle [i.e., ʿaṣr] prayer and stand before Allāh, devoutly obedient.

238. Guard strictly (five obligatory) As-Salawât (the prayers) especially the middle Salât (i.e. the best prayer - ‘Asr )[62]. And stand before Allâh with obedience [and do not speak to others during the Salât (prayers)].

[62] (V.2:238).
a) The sin of one who misses the ‘Asr prayer (intentionally):
"Narrated Ibn ‘Umar رضي الله عنهما: Allâh’s Messenger صلى الله عليه وسلم said, "Whoever misses the ‘Asr prayers (intentionally), then it is as if he lost his family and property." (Sahih Al-Bukhâri, Vol.1, Hadîth No. 527).
(b) One who omits (does not offer) the ‘Asr prayer (intentionally):*
Narrated Abu Al-Malîh: We were with Buraidah in a battle on a cloudy day and he said, "Offer the ‘Asr prayer early as the Prophet صلى الله عليه وسلم said, "Whoever omits the ‘Asr prayer, all his (good) deeds will be lost." (Sahih Al-Bukhâri, Vol.1, Hadîth No.528).
* i.e. The one who omits (does not offer) the ‘Asr prayer intentionally until its stated time is over and if he prays after that time, then it is useless.

Be guardians of your prayers, and of the midmost prayer, and stand up with devotion to Allah.