Shiva Purana
शान्तेष्वेतेषु विघ्नेषु योगासक्तस्य योगिनः ॥ उपसर्गाः प्रवर्तंते दिव्यास्ते सिद्धिसूचकाः ॥ ९ ॥
When the obstacles subside and the Yogin is absorbed in Yoga the signs begin to appear. They are divine indications of the imminent success.
english translation
zAnteSveteSu vighneSu yogAsaktasya yoginaH ॥ upasargAH pravartaMte divyAste siddhisUcakAH ॥ 9 ॥
hk transliteration by Sanscript