﴿ فَٱسْتَجَبْنَا لَهُۥ وَوَهَبْنَا لَهُۥ يَحْيَىٰ وَأَصْلَحْنَا لَهُۥ زَوْجَهُۥٓ ۚ إِنَّهُمْ كَانُوا۟ يُسَٰرِعُونَ فِى ٱلْخَيْرَٰتِ وَيَدْعُونَنَا رَغَبًۭا وَرَهَبًۭا ۖ وَكَانُوا۟ لَنَا خَٰشِعِينَ ﴾

“And so We responded unto him, and bestowed upon him the gift of John, having made his wife fit to bear him a child: [and,] verily, these [three] would vie with one another in doing good works, and would call unto Us in yearning and awe; and they were always humble before Us.”

يَدْعُونَنَا رَ‌غَبًا وَرَ‌هَبًا (and call Us with hope and fear - 21:90). This may be interpreted to mean that they call Allah Ta` ala both in comfort and distress. The other explanation of the verse is that during their prayers they remain suspended between hope and fear hoping that Allah would forgive their sins and fearing that their lapses may bring on them His displeasure.