be attentive

References in classic literature ?
As soon as their merriment had somewhat subsided, Mehevi, motioning us to be attentive, dipped the forefinger of his right hand in the dish, and giving it a rapid and scientific twirl, drew it out coated smoothly with the preparation.
Well, well, be attentive,” continued Richard, looking cautiously about him, to make certain that no eavesdropper was hid in the forest, though they were in constant motion.
We must be attentive to the X-factor to be successful.
In a message to the August 2002 Liturgical Week in Assisi, the Pope called for the liturgy to be attentive to the needs of the faithful, not only of the regular participants but of those non-practising Catholics who do not attend church regularly.
As you know, national borders do not exist when it comes to cyber space so we have to be attentive to the dangers of a cascading failure of infrastructure that could begin anywhere on the globe and carry from one substantial infrastructure into another country's infrastructure at very high speed.
Mother rats literally groom their daughters to be attentive or neglectful mothers themselves, concludes a team of neuroscientists at McGill University in Montreal.
Although the health department must be attentive to public health issues, Liu said its concerns in this case are groundless.
Whatever the reason--maybe because television and other instant and fast-moving technologies have conditioned our attention spans out of us--both adults and children lack the ability to be attentive.
He seemed to be attentive to the distinction between speaking out on moral issues and speaking out in opposition to specific candidates.
Because I cannot mention everyone, let me be attentive to those poets who have left a marked impression on my heart and memory.