The root ب ك ر (b-k-r) in the Quran

قَالُوا۟ ٱدْعُ لَنَا رَبَّكَ يُبَيِّن لَّنَا مَا هِىَ قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌ لَّا فَارِضٌ وَلَا بِكْرٌ عَوَانٌۢ بَيْنَ ذَٰلِكَ فَٱفْعَلُوا۟ مَا تُؤْمَرُونَ ۝٦٨

They said, "Call upon your Lord to make clear to us what it is." [Moses] said, "[Allāh] says, 'It is a cow which is neither old nor virgin, but median between that,' so do what you are commanded."

قَالَ رَبِّ ٱجْعَل لِّىٓ ءَايَةً قَالَ ءَايَتُكَ أَلَّا تُكَلِّمَ ٱلنَّاسَ ثَلَٰثَةَ أَيَّامٍ إِلَّا رَمْزًا وَٱذْكُر رَّبَّكَ كَثِيرًا وَسَبِّحْ بِٱلْعَشِىِّ وَٱلْإِبْكَٰرِ ۝٤١

He said, "My Lord, make for me a sign." He said, "Your sign is that you will not [be able to] speak to the people for three days except by gesture. And remember your Lord much and exalt [Him with praise] in the evening and the morning."

فَخَرَجَ عَلَىٰ قَوْمِهِۦ مِنَ ٱلْمِحْرَابِ فَأَوْحَىٰٓ إِلَيْهِمْ أَن سَبِّحُوا۟ بُكْرَةً وَعَشِيًّا ۝١١

So he came out to his people from the prayer chamber and signaled to them to exalt [Allāh] in the morning and afternoon.

لَّا يَسْمَعُونَ فِيهَا لَغْوًا إِلَّا سَلَٰمًا وَلَهُمْ رِزْقُهُمْ فِيهَا بُكْرَةً وَعَشِيًّا ۝٦٢

They will not hear therein any ill speech - only [greetings of] peace - and they will have their provision therein, morning and afternoon.

وَقَالُوٓا۟ أَسَٰطِيرُ ٱلْأَوَّلِينَ ٱكْتَتَبَهَا فَهِىَ تُمْلَىٰ عَلَيْهِ بُكْرَةً وَأَصِيلًا ۝٥

And they say, "Legends of the former peoples which he has written down, and they are dictated to him morning and afternoon."

وَسَبِّحُوهُ بُكْرَةً وَأَصِيلًا ۝٤٢

And exalt Him morning and afternoon.

فَٱصْبِرْ إِنَّ وَعْدَ ٱللَّهِ حَقٌّ وَٱسْتَغْفِرْ لِذَنۢبِكَ وَسَبِّحْ بِحَمْدِ رَبِّكَ بِٱلْعَشِىِّ وَٱلْإِبْكَٰرِ ۝٥٥

So be patient, [O Muḥammad]. Indeed, the promise of Allāh is truth. And ask forgiveness for your sin and exalt [Allāh] with praise of your Lord in the evening and the morning.

لِّتُؤْمِنُوا۟ بِٱللَّهِ وَرَسُولِهِۦ وَتُعَزِّرُوهُ وَتُوَقِّرُوهُ وَتُسَبِّحُوهُ بُكْرَةً وَأَصِيلًا ۝٩

That you [people] may believe in Allāh and His Messenger and honor him and respect him [i.e., the Prophet (ﷺ)] and exalt Him [i.e., Allāh] morning and afternoon.

وَلَقَدْ صَبَّحَهُم بُكْرَةً عَذَابٌ مُّسْتَقِرٌّ ۝٣٨

And there came upon them by morning an abiding punishment.

فَجَعَلْنَٰهُنَّ أَبْكَارًا ۝٣٦

And made them virgins,

عَسَىٰ رَبُّهُۥٓ إِن طَلَّقَكُنَّ أَن يُبْدِلَهُۥٓ أَزْوَٰجًا خَيْرًا مِّنكُنَّ مُسْلِمَٰتٍ مُّؤْمِنَٰتٍ قَٰنِتَٰتٍ تَٰٓئِبَٰتٍ عَٰبِدَٰتٍ سَٰٓئِحَٰتٍ ثَيِّبَٰتٍ وَأَبْكَارًا ۝٥

Perhaps his Lord, if he divorced you [all], would substitute for him wives better than you - submitting [to Allāh], believing, devoutly obedient, repentant, worshipping, and traveling - [ones] previously married and virgins.

وَٱذْكُرِ ٱسْمَ رَبِّكَ بُكْرَةً وَأَصِيلًا ۝٢٥

And mention the name of your Lord [in prayer] morning and evening