Shiva Purana
मेलने च शनैर्वापि तावत्साहस्रमाचरेत् । जन्मनैवेद्यदानेन जन्मार्पणफलं लभेत् ८४ ।
Even if the conjunction is only partial the offering shall be made. One gets the benefit of dedicating oneself by that.
english translation
melane ca zanairvApi tAvatsAhasramAcaret । janmanaivedyadAnena janmArpaNaphalaM labhet 84 ।
hk transliteration by Sanscript