Vijnana Bhairava Tantra
भावे त्यक्ते निरुद्धा चिन् नैव भावान्तरम् व्रजेत् । तदा तन्मध्यभावेन विकसत्यति भावना ॥ ६२ ॥
When the mind is restrained to one object of awareness, casting all others aside and not allowing movement to lake place from one to another, then inside that perception the awareness blossoms.
english translation
bhAve tyakte niruddhA cin naiva bhAvAntaram vrajet । tadA tanmadhyabhAvena vikasatyati bhAvanA ॥ 62 ॥
hk transliteration by Sanscript