Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 15
Sanskrit:
स आह देवं गिरिशमुपाधावाशु सिद्ध्यसि ।योऽल्पाभ्यां गुणदोषाभ्यामाशु तुष्यति कुप्यति ॥ १५ ॥
ITRANS:
sa āha devaṁ giriśamupādhāvāśu siddhyasiyo ’lpābhyāṁ guṇa-doṣābhyāmāśu tuṣyati kupyati
Translation:
Nārada told him: Worship Lord Śiva and you will soon achieve success. He quickly becomes pleased by seeing his worshiper’s slightest good qualities — and quickly angered by seeing his slightest fault.