Benefit of going mosque in the morning and evening:

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: مَنْ غَدَا إِلَى الْمَسْجِدِ أَوْ رَاحَ أَعَدَّ اللَّهُ لَهُ نُزُلَهُ مِنَ الْجَنَّةِ كُلَّمَا غَدَا أَوْ رَاحَ
مُتَّفَقٌ عَلَيْهِ (الألباني) : حكم
Meaning:
Abu Huraira reported the Messenger of Allah ( صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ) as saying, “If anyone goes out in the morning or in the evening to the mosque, Allah will prepare for him entertainment in paradise as often as he goes out in the morning or in the evening.”
Bukhari and Muslim
Reference : Mishkat al-Masabih 698 In-book reference : Book 4, Hadith 129

The persons who go to the mosques regularly are like pegs

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ لِلْمَسَاجِدِ أَوْتَادًا ; اَلْمَلَائِكَةُ جُلَسَاؤُهُمْ ، إِنْ غَابُوْا يَفْتَقِدُوْنَهُمْ ، وَإِنْ مَرِضُوْا عَادُوْهُمْ ، وَإِنْ كَانُوْا فِيْ حَاجَةٍ أَعَانُوْهُمْ ثُمَّ قَالَ : جَلِيْسُ الْمَسْجِدِ عَلٰى ثَلَاثِ خِصَالٍ : أَخٌ مُسْتَفَادٌ ، أَوْ كَلِمَةُ حِكْمَةٍ ، أَوْ رَحْمَةٌ مُنْتَظَرَةٌ
الراوي: أبو هريرة المحدث: الألباني - المصدر: صحيح الترغيب - الصفحة أو الرقم: 329 خلاصة حكم المحدث: حسن صحيح
Meaning:
Abu Huraira reported the Messenger of Allah ( صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ) as saying, The mosques have pegs ( The persons who go to the mosques regularly are like pegs ). the angels sit with them; if they are absent, they ( the angels ) look for them; if they are sick, they visit them, and if they are in need, they help them.
Then he ( the Messenger of Allah صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ) said: Sitting in the mosque causes to achieve 3 benefits: They meet such a brother for whom he gets the benefit regarding the religion or ( he can hear ) the words that is wise or ( he gets ) a blessing for which ( he ) is waiting.

Do not come to the mosque after consuming onions, garlics or leeks

قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : مَنْ أَكَلَ الْبَصَلَ وَالثُّومَ وَالْكُرَّاثَ فَلَا يَقْرَبَنَّ مَسْجِدَنَا، فَإِنَّ الْمَلَائِكَةَ تَتَأَذَّى مِمَّا يَتَأَذَّى مِنْهُ بَنُو آدَمَ
صحيح البخاري - 855
صحيح
Meaning:
On the authority of the Prophet, may Allah bless him and grant him peace, who said: “The person who eats onions, garlic, and leeks, let him not approach our mosque, as the angels get pain by what the children of Adam get pain."
Sahih
Sahih Al-Bukhari - 855
Annotation:
This restriction is applicable when a person comes to the mosque after consuming raw onions or raw garlic or raw leek. It is makruh. Because the bad smell of these causes pain for the angels. We should remember that this restriction is not considered as haram. It is makruh. But if a person comes to the mosque after eating cooked garlic or cooked onions, there is no restriction coming to the mosque. This is because there is no bad smell when garlic, onions or leek are cooked.