The Command to call upon Allah By His grace and kindness,
وَقَالَ رَبُّكُمُ
And your Lord said;
Allah encourages His servants to call upon Him, and He guarantees to respond.
Sufyan Ath-Thawri used to say;
"O You Who love most those who ask of You, and O You Who hate most those who do not ask of You, and there is no one like that apart from You, O Lord."
This was recorded by Ibn Abi Hatim.
Similarly; the poet said;
"Allah hates not to be asked, and the son of Adam hates to be asked."
Qatadah said that Ka`b Al-Ahbar said,
"This Ummah has been given three things which were not given to any nation before, only to Prophets.
When Allah sent a Prophet, He said to him, `You are a witness over your nation.' But you have been made witnesses over mankind;
it was said to the Prophets individually, `Allah has not laid upon you any hardship in religion,' but He said to this entire Ummah;
وَمَا جَعَلَ عَلَيْكمْ فِى الدِّينِ مِنْ حَرَجٍ
(and (Allah) has not laid upon you in religion any hardship), (22;78) and
it was said to the Prophets individually; `Call upon Me, I will answer you,' but it was said to this Ummah,
ادْعُونِي أَسْتَجِبْ لَكُم
(Call upon Me, I will answer you)."
This was recorded by Ibn Abi Hatim.
Imam Ahmad recorded that Al-Nu`man bin Bashir, may Allah be pleased with him, said,
"The Messenger of Allah said;
إِنَّ الدُّعَاءَ هُوَ الْعِبَادَة
Indeed the supplication is the worship."
Then he recited,
وَقَالَ رَبُّكُمُ
ادْعُونِي أَسْتَجِبْ لَكُمْ إِنَّ الَّذِينَ يَسْتَكْبِرُونَ عَنْ عِبَادَتِي سَيَدْخُلُونَ جَهَنَّمَ دَاخِرِينَ
And your Lord said;"Call upon Me, I will answer you. Verily, those who scorn My worship they will surely enter Hell in humiliation!".
This was also recorded by the Sunan compilers; At-Tirmdhi, An-Nasa'i, Ibn Majah, and Ibn Abi Hatim and Ibn Jarir.
At-Tirmidhi said, "Hasan Sahih."
It was also recorded by Abu Dawud, At-Tirmidhi, An-Nasa'i, and Ibn Jarir with a different chain of narration.
Allah's saying;
إِنَّ الَّذِينَ يَسْتَكْبِرُونَ عَنْ عِبَادَتِي
Verily, those who scorn My worship,
means, `those who are too proud to call on Me and single Me out,'
سَيَدْخُلُونَ جَهَنَّمَ دَاخِرِينَ
they will surely enter Hell in humiliation!
means, in disgrace and insignificance.
Imam Ahmad recorded from `Amr bin Shu`ayb from his father, from his grandfather that the Prophet said;
يُحْشَرُ الْمُتَكَبِّرُونَ يَوْمَ الْقِيَامَةِ أَمْثَالَ الذَّرِّ فِي صُوَرِ النَّاسِ يَعْلُوهُمْ كُلُّ شَيْءٍ مِنَ الصَّغَارِ حَتْى يَدْخُلُوا سِجْنًا فِي جَهَنَّمَ يُقَالُ لَهُ بُولَسُ تَعْلُوهُمْ نَارُ الاْنْيَارِ يُسْقَوْنَ مِنْ طِينَةِ الْخَبَالِ عُصَارَةِ أَهْلِ النَّار
The proud will be gathered on the Day of Resurrection like ants in the image of people, and everything will be stepping on them, humiliating them, until they enter a prison in Hell called Bulas. They will be fed flames of fire, and given for drink a paste of insanity dripping from the people the Fire.